/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:16:51,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:16:51,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:16:51,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:16:51,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 14:16:51,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 14:16:51,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 14:16:51,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 14:16:51,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 14:16:51,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 14:16:51,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 14:16:51,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 14:16:51,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 14:16:51,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 14:16:51,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 14:16:51,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 14:16:51,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 14:16:51,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 14:16:51,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 14:16:51,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 14:16:51,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 14:16:51,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:16:51,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:16:51,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:16:51,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:16:51,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:16:51,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:16:51,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:16:51,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:16:51,869 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:16:51,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:16:51,869 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:16:51,870 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:16:51,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:16:51,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:16:51,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:16:51,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:16:51,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:16:51,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:16:51,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:16:51,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:16:51,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:16:51,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:16:51,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:16:51,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:16:51,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:16:51,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:16:51,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:16:51,874 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:16:51,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:16:52,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:16:52,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:16:52,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:16:52,125 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:16:52,126 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:16:52,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2022-01-18 14:16:52,128 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2022-01-18 14:16:52,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:16:52,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:16:52,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:16:52,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:16:52,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:16:52,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,171 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:16:52,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:16:52,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:16:52,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:16:52,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:16:52,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:16:52,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:16:52,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:16:52,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:16:52,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/1) ... [2022-01-18 14:16:52,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:16:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:52,216 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) [2022-01-18 14:16:52,220 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 [2022-01-18 14:16:52,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:16:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:16:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:16:52,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:16:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:16:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:16:52,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:16:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:16:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:16:52,247 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 14:16:52,281 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:16:52,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:16:52,343 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:16:52,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:16:52,349 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:16:52,351 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:16:52 BoogieIcfgContainer [2022-01-18 14:16:52,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:16:52,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:16:52,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:16:52,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:16:52,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:16:52" (1/2) ... [2022-01-18 14:16:52,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d37a0f and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:16:52, skipping insertion in model container [2022-01-18 14:16:52,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:16:52" (2/2) ... [2022-01-18 14:16:52,369 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2022-01-18 14:16:52,372 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:16:52,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:16:52,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:16:52,373 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:16:52,420 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 14:16:52,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:16:52,482 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 14:16:52,482 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 14:16:52,491 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2022-01-18 14:16:52,518 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 14:16:52,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:52,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:52,528 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash -167955401, now seen corresponding path program 1 times [2022-01-18 14:16:52,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370179792] [2022-01-18 14:16:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:52,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:52,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370179792] [2022-01-18 14:16:52,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370179792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:52,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:52,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:16:52,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837028963] [2022-01-18 14:16:52,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:52,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:16:52,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:16:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:16:52,709 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:52,805 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2022-01-18 14:16:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:16:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 14:16:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:52,820 INFO L225 Difference]: With dead ends: 102 [2022-01-18 14:16:52,820 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 14:16:52,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:16:52,825 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:52,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 14:16:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2022-01-18 14:16:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2022-01-18 14:16:52,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2022-01-18 14:16:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:52,878 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2022-01-18 14:16:52,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2022-01-18 14:16:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:16:52,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:52,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:52,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:16:52,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1051815822, now seen corresponding path program 1 times [2022-01-18 14:16:52,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:52,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134766022] [2022-01-18 14:16:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:52,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:52,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134766022] [2022-01-18 14:16:52,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134766022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:52,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:52,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:16:52,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140002514] [2022-01-18 14:16:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:52,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:16:52,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:16:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:16:52,978 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:53,030 INFO L93 Difference]: Finished difference Result 128 states and 286 transitions. [2022-01-18 14:16:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:16:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:16:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:53,032 INFO L225 Difference]: With dead ends: 128 [2022-01-18 14:16:53,032 INFO L226 Difference]: Without dead ends: 128 [2022-01-18 14:16:53,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:16:53,034 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:53,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-18 14:16:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2022-01-18 14:16:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 88 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 204 transitions. [2022-01-18 14:16:53,047 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 204 transitions. Word has length 14 [2022-01-18 14:16:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:53,047 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 204 transitions. [2022-01-18 14:16:53,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 204 transitions. [2022-01-18 14:16:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:16:53,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:53,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:53,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 14:16:53,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1207263346, now seen corresponding path program 2 times [2022-01-18 14:16:53,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:53,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817814841] [2022-01-18 14:16:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:53,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:53,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817814841] [2022-01-18 14:16:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817814841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:53,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:53,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:16:53,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331805232] [2022-01-18 14:16:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:53,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:16:53,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:16:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:16:53,123 INFO L87 Difference]: Start difference. First operand 89 states and 204 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:53,197 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2022-01-18 14:16:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:16:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:16:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:53,200 INFO L225 Difference]: With dead ends: 152 [2022-01-18 14:16:53,200 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 14:16:53,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:16:53,201 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:53,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 14:16:53,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 94. [2022-01-18 14:16:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2022-01-18 14:16:53,227 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2022-01-18 14:16:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:53,228 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2022-01-18 14:16:53,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2022-01-18 14:16:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:16:53,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:53,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:53,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 14:16:53,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1376889075, now seen corresponding path program 1 times [2022-01-18 14:16:53,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:53,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237051421] [2022-01-18 14:16:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:53,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:53,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:53,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237051421] [2022-01-18 14:16:53,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237051421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:53,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:53,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:16:53,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815327349] [2022-01-18 14:16:53,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:53,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:16:53,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:16:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:16:53,324 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:53,392 INFO L93 Difference]: Finished difference Result 138 states and 314 transitions. [2022-01-18 14:16:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:16:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:16:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:53,394 INFO L225 Difference]: With dead ends: 138 [2022-01-18 14:16:53,395 INFO L226 Difference]: Without dead ends: 130 [2022-01-18 14:16:53,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:16:53,402 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:53,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-18 14:16:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2022-01-18 14:16:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.292929292929293) internal successors, (227), 99 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2022-01-18 14:16:53,414 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 14 [2022-01-18 14:16:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:53,414 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2022-01-18 14:16:53,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2022-01-18 14:16:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:16:53,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:53,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:53,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 14:16:53,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash 633913395, now seen corresponding path program 2 times [2022-01-18 14:16:53,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60364723] [2022-01-18 14:16:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:53,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:53,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60364723] [2022-01-18 14:16:53,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60364723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:53,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517318707] [2022-01-18 14:16:53,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:16:53,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:53,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:53,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:16:53,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 14:16:53,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:16:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:16:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:53,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:53,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517318707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:53,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:53,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 14:16:53,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077345692] [2022-01-18 14:16:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:53,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:16:53,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:16:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:16:53,852 INFO L87 Difference]: Start difference. First operand 100 states and 227 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:53,934 INFO L93 Difference]: Finished difference Result 150 states and 346 transitions. [2022-01-18 14:16:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:16:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:16:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:53,936 INFO L225 Difference]: With dead ends: 150 [2022-01-18 14:16:53,936 INFO L226 Difference]: Without dead ends: 150 [2022-01-18 14:16:53,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:53,937 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:53,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-18 14:16:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2022-01-18 14:16:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2022-01-18 14:16:53,945 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2022-01-18 14:16:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:53,945 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2022-01-18 14:16:53,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2022-01-18 14:16:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:16:53,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:53,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:54,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:54,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:54,164 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 56537190, now seen corresponding path program 3 times [2022-01-18 14:16:54,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:54,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394103559] [2022-01-18 14:16:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:54,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:54,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:54,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394103559] [2022-01-18 14:16:54,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394103559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:54,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:54,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:16:54,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952249861] [2022-01-18 14:16:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:54,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:16:54,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:16:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:16:54,205 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:54,250 INFO L93 Difference]: Finished difference Result 134 states and 303 transitions. [2022-01-18 14:16:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:16:54,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:16:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:54,251 INFO L225 Difference]: With dead ends: 134 [2022-01-18 14:16:54,251 INFO L226 Difference]: Without dead ends: 132 [2022-01-18 14:16:54,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:16:54,252 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:54,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-18 14:16:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2022-01-18 14:16:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2022-01-18 14:16:54,267 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2022-01-18 14:16:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:54,267 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2022-01-18 14:16:54,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2022-01-18 14:16:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:16:54,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:54,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:54,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 14:16:54,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2012435128, now seen corresponding path program 1 times [2022-01-18 14:16:54,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:54,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451326908] [2022-01-18 14:16:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:54,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:16:54,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451326908] [2022-01-18 14:16:54,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451326908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923815914] [2022-01-18 14:16:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:54,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:54,338 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) [2022-01-18 14:16:54,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 14:16:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:16:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:54,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:16:54,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923815914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:54,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:54,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 6 [2022-01-18 14:16:54,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557741283] [2022-01-18 14:16:54,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:16:54,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:16:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:54,556 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:54,641 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2022-01-18 14:16:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:16:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:16:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:54,644 INFO L225 Difference]: With dead ends: 300 [2022-01-18 14:16:54,644 INFO L226 Difference]: Without dead ends: 286 [2022-01-18 14:16:54,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:54,645 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:54,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-18 14:16:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2022-01-18 14:16:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2022-01-18 14:16:54,662 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2022-01-18 14:16:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:54,662 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2022-01-18 14:16:54,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2022-01-18 14:16:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:16:54,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:54,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:54,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:54,875 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,SelfDestructingSolverStorable6 [2022-01-18 14:16:54,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 617878888, now seen corresponding path program 1 times [2022-01-18 14:16:54,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564578045] [2022-01-18 14:16:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:54,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564578045] [2022-01-18 14:16:54,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564578045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263149035] [2022-01-18 14:16:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:54,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:54,934 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) [2022-01-18 14:16:54,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 14:16:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:54,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:55,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:55,062 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:16:55,063 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 15 [2022-01-18 14:16:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:55,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263149035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:55,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:55,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-01-18 14:16:55,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269256262] [2022-01-18 14:16:55,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:55,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:16:55,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:16:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:55,077 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:55,164 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2022-01-18 14:16:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:16:55,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:16:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:55,166 INFO L225 Difference]: With dead ends: 248 [2022-01-18 14:16:55,166 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 14:16:55,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:16:55,167 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:55,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 14:16:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2022-01-18 14:16:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2022-01-18 14:16:55,176 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2022-01-18 14:16:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:55,177 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2022-01-18 14:16:55,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2022-01-18 14:16:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:16:55,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:55,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:55,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:55,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:55,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash 456277538, now seen corresponding path program 2 times [2022-01-18 14:16:55,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624064798] [2022-01-18 14:16:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:55,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:16:55,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624064798] [2022-01-18 14:16:55,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624064798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:55,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:55,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:16:55,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450383516] [2022-01-18 14:16:55,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:55,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:16:55,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:16:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:16:55,437 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:55,473 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2022-01-18 14:16:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:16:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:16:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:55,475 INFO L225 Difference]: With dead ends: 311 [2022-01-18 14:16:55,475 INFO L226 Difference]: Without dead ends: 304 [2022-01-18 14:16:55,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:16:55,477 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:55,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-18 14:16:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2022-01-18 14:16:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2022-01-18 14:16:55,486 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2022-01-18 14:16:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:55,486 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2022-01-18 14:16:55,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2022-01-18 14:16:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:16:55,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:55,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:55,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 14:16:55,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 614663528, now seen corresponding path program 1 times [2022-01-18 14:16:55,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412487733] [2022-01-18 14:16:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:55,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:55,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412487733] [2022-01-18 14:16:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412487733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128798875] [2022-01-18 14:16:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:55,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:55,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:55,544 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) [2022-01-18 14:16:55,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 14:16:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:55,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:55,665 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:16:55,665 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 15 [2022-01-18 14:16:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128798875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:55,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:55,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-01-18 14:16:55,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626642944] [2022-01-18 14:16:55,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:55,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:16:55,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:16:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:55,681 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:55,738 INFO L93 Difference]: Finished difference Result 355 states and 832 transitions. [2022-01-18 14:16:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:16:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:16:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:55,740 INFO L225 Difference]: With dead ends: 355 [2022-01-18 14:16:55,740 INFO L226 Difference]: Without dead ends: 314 [2022-01-18 14:16:55,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:16:55,741 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:55,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-18 14:16:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 225. [2022-01-18 14:16:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.46875) internal successors, (553), 224 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 553 transitions. [2022-01-18 14:16:55,750 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 553 transitions. Word has length 17 [2022-01-18 14:16:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 553 transitions. [2022-01-18 14:16:55,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 553 transitions. [2022-01-18 14:16:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:16:55,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:55,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:55,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:55,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -38242968, now seen corresponding path program 2 times [2022-01-18 14:16:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:55,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686707175] [2022-01-18 14:16:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:55,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:56,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686707175] [2022-01-18 14:16:56,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686707175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:56,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:16:56,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:16:56,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073478475] [2022-01-18 14:16:56,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:56,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:16:56,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:56,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:16:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:16:56,009 INFO L87 Difference]: Start difference. First operand 225 states and 553 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:56,056 INFO L93 Difference]: Finished difference Result 243 states and 593 transitions. [2022-01-18 14:16:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:16:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 14:16:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:56,058 INFO L225 Difference]: With dead ends: 243 [2022-01-18 14:16:56,058 INFO L226 Difference]: Without dead ends: 243 [2022-01-18 14:16:56,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:16:56,059 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:56,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-18 14:16:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-01-18 14:16:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.450413223140496) internal successors, (593), 242 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 593 transitions. [2022-01-18 14:16:56,065 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 593 transitions. Word has length 17 [2022-01-18 14:16:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 593 transitions. [2022-01-18 14:16:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 593 transitions. [2022-01-18 14:16:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:56,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:56,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:56,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 14:16:56,068 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 417389902, now seen corresponding path program 3 times [2022-01-18 14:16:56,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:56,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162777778] [2022-01-18 14:16:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:56,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:56,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:56,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162777778] [2022-01-18 14:16:56,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162777778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:56,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024354728] [2022-01-18 14:16:56,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:16:56,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:56,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:56,147 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) [2022-01-18 14:16:56,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 14:16:56,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:16:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:16:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:56,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 14:16:56,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024354728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:56,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 14:16:56,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-01-18 14:16:56,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383967979] [2022-01-18 14:16:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:56,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:16:56,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:16:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:16:56,504 INFO L87 Difference]: Start difference. First operand 243 states and 593 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:56,707 INFO L93 Difference]: Finished difference Result 410 states and 950 transitions. [2022-01-18 14:16:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:16:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:16:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:56,708 INFO L225 Difference]: With dead ends: 410 [2022-01-18 14:16:56,709 INFO L226 Difference]: Without dead ends: 403 [2022-01-18 14:16:56,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:16:56,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:56,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 72 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-18 14:16:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 295. [2022-01-18 14:16:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.4727891156462585) internal successors, (727), 294 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 727 transitions. [2022-01-18 14:16:56,717 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 727 transitions. Word has length 20 [2022-01-18 14:16:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:56,718 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 727 transitions. [2022-01-18 14:16:56,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 727 transitions. [2022-01-18 14:16:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:56,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:56,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:56,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:56,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 14:16:56,941 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1841689266, now seen corresponding path program 4 times [2022-01-18 14:16:56,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044853866] [2022-01-18 14:16:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:56,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:57,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044853866] [2022-01-18 14:16:57,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044853866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178839657] [2022-01-18 14:16:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:16:57,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:57,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:57,012 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) [2022-01-18 14:16:57,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 14:16:57,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:16:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:16:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:57,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 14:16:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178839657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:16:57,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 14:16:57,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-01-18 14:16:57,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312704814] [2022-01-18 14:16:57,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:16:57,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:16:57,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:16:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:16:57,215 INFO L87 Difference]: Start difference. First operand 295 states and 727 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:57,324 INFO L93 Difference]: Finished difference Result 559 states and 1286 transitions. [2022-01-18 14:16:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:16:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:16:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:57,327 INFO L225 Difference]: With dead ends: 559 [2022-01-18 14:16:57,327 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 14:16:57,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:16:57,328 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:57,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 49 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 14:16:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 363. [2022-01-18 14:16:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.5138121546961325) internal successors, (910), 362 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 910 transitions. [2022-01-18 14:16:57,339 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 910 transitions. Word has length 20 [2022-01-18 14:16:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:57,340 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 910 transitions. [2022-01-18 14:16:57,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 910 transitions. [2022-01-18 14:16:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:57,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:57,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:57,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:57,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:57,564 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:57,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1408864728, now seen corresponding path program 5 times [2022-01-18 14:16:57,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:57,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751905225] [2022-01-18 14:16:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:57,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:57,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751905225] [2022-01-18 14:16:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751905225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468573564] [2022-01-18 14:16:57,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:16:57,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:57,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:57,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:16:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 14:16:57,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:16:57,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:57,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:57,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468573564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:57,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:57,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-01-18 14:16:57,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979278136] [2022-01-18 14:16:57,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:57,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:16:57,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:16:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:16:57,860 INFO L87 Difference]: Start difference. First operand 363 states and 910 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:58,017 INFO L93 Difference]: Finished difference Result 581 states and 1368 transitions. [2022-01-18 14:16:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:16:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:16:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:58,020 INFO L225 Difference]: With dead ends: 581 [2022-01-18 14:16:58,020 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 14:16:58,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:16:58,021 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:58,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 69 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 14:16:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 364. [2022-01-18 14:16:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.509641873278237) internal successors, (911), 363 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 911 transitions. [2022-01-18 14:16:58,033 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 911 transitions. Word has length 20 [2022-01-18 14:16:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:58,033 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 911 transitions. [2022-01-18 14:16:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 911 transitions. [2022-01-18 14:16:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:58,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:58,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:58,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:58,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:58,253 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2078534299, now seen corresponding path program 6 times [2022-01-18 14:16:58,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:58,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192057745] [2022-01-18 14:16:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:58,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:58,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192057745] [2022-01-18 14:16:58,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192057745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025177137] [2022-01-18 14:16:58,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:16:58,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:58,298 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) [2022-01-18 14:16:58,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 14:16:58,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:16:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:58,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025177137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:58,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:16:58,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934806326] [2022-01-18 14:16:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:58,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:16:58,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:16:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:58,473 INFO L87 Difference]: Start difference. First operand 364 states and 911 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:58,546 INFO L93 Difference]: Finished difference Result 733 states and 1784 transitions. [2022-01-18 14:16:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:16:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:16:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:58,550 INFO L225 Difference]: With dead ends: 733 [2022-01-18 14:16:58,550 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 14:16:58,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:16:58,550 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:58,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 39 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 14:16:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 499. [2022-01-18 14:16:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.6305220883534135) internal successors, (1310), 498 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1310 transitions. [2022-01-18 14:16:58,566 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1310 transitions. Word has length 20 [2022-01-18 14:16:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:58,566 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1310 transitions. [2022-01-18 14:16:58,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1310 transitions. [2022-01-18 14:16:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:58,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:58,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:58,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:58,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 14:16:58,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1456653889, now seen corresponding path program 7 times [2022-01-18 14:16:58,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:58,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354642561] [2022-01-18 14:16:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:58,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:58,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:58,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354642561] [2022-01-18 14:16:58,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354642561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:58,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670612950] [2022-01-18 14:16:58,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:16:58,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:58,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:58,827 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) [2022-01-18 14:16:58,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 14:16:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:58,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:58,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:58,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:58,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670612950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:58,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:58,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:16:58,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841885273] [2022-01-18 14:16:58,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:58,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:16:58,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:16:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:58,985 INFO L87 Difference]: Start difference. First operand 499 states and 1310 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:59,098 INFO L93 Difference]: Finished difference Result 733 states and 1776 transitions. [2022-01-18 14:16:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:16:59,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:16:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:59,103 INFO L225 Difference]: With dead ends: 733 [2022-01-18 14:16:59,103 INFO L226 Difference]: Without dead ends: 733 [2022-01-18 14:16:59,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:16:59,104 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:59,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 50 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:16:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-18 14:16:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 496. [2022-01-18 14:16:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.614141414141414) internal successors, (1294), 495 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1294 transitions. [2022-01-18 14:16:59,118 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1294 transitions. Word has length 20 [2022-01-18 14:16:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:59,118 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1294 transitions. [2022-01-18 14:16:59,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1294 transitions. [2022-01-18 14:16:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:59,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:59,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:59,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:59,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 14:16:59,335 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 524837442, now seen corresponding path program 8 times [2022-01-18 14:16:59,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:59,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667229973] [2022-01-18 14:16:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:59,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:59,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:59,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667229973] [2022-01-18 14:16:59,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667229973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:59,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962817662] [2022-01-18 14:16:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:16:59,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:59,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:16:59,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:16:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:59,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 14:16:59,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:59,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:16:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:16:59,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:16:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:16:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962817662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:16:59,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:16:59,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:16:59,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736198488] [2022-01-18 14:16:59,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:16:59,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:16:59,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:16:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:16:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:16:59,566 INFO L87 Difference]: Start difference. First operand 496 states and 1294 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:16:59,630 INFO L93 Difference]: Finished difference Result 580 states and 1484 transitions. [2022-01-18 14:16:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:16:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:16:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:16:59,633 INFO L225 Difference]: With dead ends: 580 [2022-01-18 14:16:59,633 INFO L226 Difference]: Without dead ends: 577 [2022-01-18 14:16:59,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:16:59,633 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:16:59,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:16:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-18 14:16:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 492. [2022-01-18 14:16:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.604887983706721) internal successors, (1279), 491 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1279 transitions. [2022-01-18 14:16:59,645 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1279 transitions. Word has length 20 [2022-01-18 14:16:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:16:59,645 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1279 transitions. [2022-01-18 14:16:59,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:16:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1279 transitions. [2022-01-18 14:16:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:16:59,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:16:59,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:16:59,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 14:16:59,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 14:16:59,868 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:16:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:16:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -855067826, now seen corresponding path program 9 times [2022-01-18 14:16:59,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:16:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543857520] [2022-01-18 14:16:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:16:59,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:16:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:16:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:16:59,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:16:59,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543857520] [2022-01-18 14:16:59,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543857520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:16:59,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557837056] [2022-01-18 14:16:59,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:16:59,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:16:59,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:16:59,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:16:59,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 14:16:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:16:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:16:59,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:16:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:00,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557837056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:00,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:17:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700406139] [2022-01-18 14:17:00,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:00,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:00,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:00,136 INFO L87 Difference]: Start difference. First operand 492 states and 1279 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:00,241 INFO L93 Difference]: Finished difference Result 724 states and 1784 transitions. [2022-01-18 14:17:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:00,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:17:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:00,245 INFO L225 Difference]: With dead ends: 724 [2022-01-18 14:17:00,245 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 14:17:00,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:00,245 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:00,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 14:17:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 528. [2022-01-18 14:17:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.6242884250474385) internal successors, (1383), 527 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1383 transitions. [2022-01-18 14:17:00,260 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1383 transitions. Word has length 20 [2022-01-18 14:17:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:00,260 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1383 transitions. [2022-01-18 14:17:00,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1383 transitions. [2022-01-18 14:17:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:17:00,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:00,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:00,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:00,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 14:17:00,482 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1432444031, now seen corresponding path program 10 times [2022-01-18 14:17:00,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76754945] [2022-01-18 14:17:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:00,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:00,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:00,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76754945] [2022-01-18 14:17:00,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76754945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:00,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493124585] [2022-01-18 14:17:00,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:00,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:00,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:00,528 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) [2022-01-18 14:17:00,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:00,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:00,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 14:17:00,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:17:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:00,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:00,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493124585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:00,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:00,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:17:00,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943091324] [2022-01-18 14:17:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:00,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:00,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:00,700 INFO L87 Difference]: Start difference. First operand 528 states and 1383 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:00,810 INFO L93 Difference]: Finished difference Result 936 states and 2429 transitions. [2022-01-18 14:17:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:17:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:00,814 INFO L225 Difference]: With dead ends: 936 [2022-01-18 14:17:00,814 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 14:17:00,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:00,815 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:00,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 52 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 14:17:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 735. [2022-01-18 14:17:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.7329700272479562) internal successors, (2006), 734 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2006 transitions. [2022-01-18 14:17:00,834 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2006 transitions. Word has length 20 [2022-01-18 14:17:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:00,835 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2006 transitions. [2022-01-18 14:17:00,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2006 transitions. [2022-01-18 14:17:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:17:00,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:00,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:00,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:01,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:01,051 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2054324441, now seen corresponding path program 11 times [2022-01-18 14:17:01,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:01,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639381686] [2022-01-18 14:17:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:01,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:01,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639381686] [2022-01-18 14:17:01,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639381686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409879663] [2022-01-18 14:17:01,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:01,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:01,103 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) [2022-01-18 14:17:01,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 14:17:01,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:17:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:17:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:01,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:01,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409879663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:01,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:01,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:17:01,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036446480] [2022-01-18 14:17:01,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:01,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:01,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:01,276 INFO L87 Difference]: Start difference. First operand 735 states and 2006 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:01,385 INFO L93 Difference]: Finished difference Result 942 states and 2441 transitions. [2022-01-18 14:17:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:17:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:17:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:01,389 INFO L225 Difference]: With dead ends: 942 [2022-01-18 14:17:01,389 INFO L226 Difference]: Without dead ends: 942 [2022-01-18 14:17:01,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:01,390 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:01,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-18 14:17:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 740. [2022-01-18 14:17:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.7212449255751014) internal successors, (2011), 739 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2011 transitions. [2022-01-18 14:17:01,410 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2011 transitions. Word has length 20 [2022-01-18 14:17:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:01,410 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2011 transitions. [2022-01-18 14:17:01,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2011 transitions. [2022-01-18 14:17:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:17:01,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:01,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:01,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:01,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-01-18 14:17:01,625 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1308826408, now seen corresponding path program 12 times [2022-01-18 14:17:01,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820598830] [2022-01-18 14:17:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:01,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:01,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820598830] [2022-01-18 14:17:01,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820598830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:01,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51084782] [2022-01-18 14:17:01,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:01,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:01,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:01,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 14:17:01,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 14:17:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:17:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:01,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51084782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:01,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:01,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 14:17:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027143043] [2022-01-18 14:17:01,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:01,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:01,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:01,838 INFO L87 Difference]: Start difference. First operand 740 states and 2011 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:01,902 INFO L93 Difference]: Finished difference Result 933 states and 2399 transitions. [2022-01-18 14:17:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:17:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:01,907 INFO L225 Difference]: With dead ends: 933 [2022-01-18 14:17:01,907 INFO L226 Difference]: Without dead ends: 930 [2022-01-18 14:17:01,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:01,907 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:01,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-18 14:17:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 742. [2022-01-18 14:17:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.7112010796221324) internal successors, (2009), 741 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2009 transitions. [2022-01-18 14:17:01,927 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2009 transitions. Word has length 20 [2022-01-18 14:17:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:01,927 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2009 transitions. [2022-01-18 14:17:01,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2009 transitions. [2022-01-18 14:17:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:17:01,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:01,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:01,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:02,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:02,144 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:02,144 INFO L85 PathProgramCache]: Analyzing trace with hash 603070399, now seen corresponding path program 13 times [2022-01-18 14:17:02,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164613249] [2022-01-18 14:17:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:02,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:02,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164613249] [2022-01-18 14:17:02,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164613249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391274709] [2022-01-18 14:17:02,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:02,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:02,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:02,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:02,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 14:17:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:02,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:17:02,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:02,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:02,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391274709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:02,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:02,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-01-18 14:17:02,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20886523] [2022-01-18 14:17:02,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:02,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:02,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:02,371 INFO L87 Difference]: Start difference. First operand 742 states and 2009 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:02,509 INFO L93 Difference]: Finished difference Result 954 states and 2449 transitions. [2022-01-18 14:17:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:17:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:02,513 INFO L225 Difference]: With dead ends: 954 [2022-01-18 14:17:02,513 INFO L226 Difference]: Without dead ends: 954 [2022-01-18 14:17:02,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:02,513 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:02,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-18 14:17:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 706. [2022-01-18 14:17:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.697872340425532) internal successors, (1902), 705 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1902 transitions. [2022-01-18 14:17:02,530 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1902 transitions. Word has length 20 [2022-01-18 14:17:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:02,530 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1902 transitions. [2022-01-18 14:17:02,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1902 transitions. [2022-01-18 14:17:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 14:17:02,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:02,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:02,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:02,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:02,755 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1515888974, now seen corresponding path program 14 times [2022-01-18 14:17:02,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937538870] [2022-01-18 14:17:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:02,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:02,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:02,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937538870] [2022-01-18 14:17:02,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937538870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:02,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581721512] [2022-01-18 14:17:02,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:02,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:02,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:02,798 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) [2022-01-18 14:17:02,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 14:17:02,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:02,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:17:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:02,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581721512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:02,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:02,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:17:02,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907923239] [2022-01-18 14:17:02,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:02,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:02,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:02,986 INFO L87 Difference]: Start difference. First operand 706 states and 1902 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:03,083 INFO L93 Difference]: Finished difference Result 867 states and 2233 transitions. [2022-01-18 14:17:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:17:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 14:17:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:03,086 INFO L225 Difference]: With dead ends: 867 [2022-01-18 14:17:03,086 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 14:17:03,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:03,087 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:03,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 44 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 14:17:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 730. [2022-01-18 14:17:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.663923182441701) internal successors, (1942), 729 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1942 transitions. [2022-01-18 14:17:03,104 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1942 transitions. Word has length 20 [2022-01-18 14:17:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:03,104 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1942 transitions. [2022-01-18 14:17:03,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1942 transitions. [2022-01-18 14:17:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:03,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:03,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:03,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 14:17:03,319 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1957491467, now seen corresponding path program 1 times [2022-01-18 14:17:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:03,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967501716] [2022-01-18 14:17:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:03,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:03,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967501716] [2022-01-18 14:17:03,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967501716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044785571] [2022-01-18 14:17:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:03,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:03,384 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) [2022-01-18 14:17:03,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 14:17:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:03,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:03,548 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:03,548 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 20 treesize of output 19 [2022-01-18 14:17:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:03,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044785571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:03,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:03,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 14:17:03,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100144832] [2022-01-18 14:17:03,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:03,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:03,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:03,572 INFO L87 Difference]: Start difference. First operand 730 states and 1942 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:03,885 INFO L93 Difference]: Finished difference Result 1052 states and 2592 transitions. [2022-01-18 14:17:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:17:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:03,889 INFO L225 Difference]: With dead ends: 1052 [2022-01-18 14:17:03,889 INFO L226 Difference]: Without dead ends: 1039 [2022-01-18 14:17:03,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:17:03,890 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:03,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 192 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-18 14:17:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 769. [2022-01-18 14:17:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.62890625) internal successors, (2019), 768 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2019 transitions. [2022-01-18 14:17:03,908 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2019 transitions. Word has length 23 [2022-01-18 14:17:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:03,908 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2019 transitions. [2022-01-18 14:17:03,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2019 transitions. [2022-01-18 14:17:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:03,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:03,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:03,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:04,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:04,132 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1617196245, now seen corresponding path program 15 times [2022-01-18 14:17:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901274726] [2022-01-18 14:17:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:04,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:04,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901274726] [2022-01-18 14:17:04,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901274726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55440066] [2022-01-18 14:17:04,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:04,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:04,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:04,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:04,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 14:17:04,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:04,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:04,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:04,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:04,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55440066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:04,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 14:17:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269029912] [2022-01-18 14:17:04,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:04,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:04,334 INFO L87 Difference]: Start difference. First operand 769 states and 2019 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:04,408 INFO L93 Difference]: Finished difference Result 1098 states and 2745 transitions. [2022-01-18 14:17:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:17:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:04,413 INFO L225 Difference]: With dead ends: 1098 [2022-01-18 14:17:04,413 INFO L226 Difference]: Without dead ends: 1085 [2022-01-18 14:17:04,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:04,414 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:04,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 58 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-18 14:17:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 904. [2022-01-18 14:17:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.611295681063123) internal successors, (2358), 903 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2358 transitions. [2022-01-18 14:17:04,434 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2358 transitions. Word has length 23 [2022-01-18 14:17:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:04,434 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2358 transitions. [2022-01-18 14:17:04,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2358 transitions. [2022-01-18 14:17:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:04,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:04,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:04,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:04,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:04,651 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1684522285, now seen corresponding path program 16 times [2022-01-18 14:17:04,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688427556] [2022-01-18 14:17:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:04,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:04,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:04,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688427556] [2022-01-18 14:17:04,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688427556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:04,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824437331] [2022-01-18 14:17:04,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:04,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:04,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:04,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:04,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 14:17:04,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:04,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:04,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:04,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824437331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:04,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:04,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 14:17:04,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553794259] [2022-01-18 14:17:04,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:04,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:04,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:04,832 INFO L87 Difference]: Start difference. First operand 904 states and 2358 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:04,893 INFO L93 Difference]: Finished difference Result 1255 states and 3209 transitions. [2022-01-18 14:17:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:17:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:04,897 INFO L225 Difference]: With dead ends: 1255 [2022-01-18 14:17:04,897 INFO L226 Difference]: Without dead ends: 1242 [2022-01-18 14:17:04,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 12 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:04,898 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:04,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-01-18 14:17:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1038. [2022-01-18 14:17:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.6673095467695274) internal successors, (2766), 1037 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2766 transitions. [2022-01-18 14:17:04,920 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2766 transitions. Word has length 23 [2022-01-18 14:17:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:04,921 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 2766 transitions. [2022-01-18 14:17:04,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2766 transitions. [2022-01-18 14:17:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:04,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:04,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:04,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:05,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:05,144 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 709154997, now seen corresponding path program 1 times [2022-01-18 14:17:05,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:05,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141919546] [2022-01-18 14:17:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:05,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:05,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141919546] [2022-01-18 14:17:05,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141919546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114104385] [2022-01-18 14:17:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:05,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:05,199 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:05,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 14:17:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:05,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:05,341 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:05,341 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 20 treesize of output 19 [2022-01-18 14:17:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:05,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114104385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:05,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:05,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-18 14:17:05,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841834304] [2022-01-18 14:17:05,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:05,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:17:05,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:17:05,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:05,370 INFO L87 Difference]: Start difference. First operand 1038 states and 2766 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:05,570 INFO L93 Difference]: Finished difference Result 1180 states and 2996 transitions. [2022-01-18 14:17:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:05,575 INFO L225 Difference]: With dead ends: 1180 [2022-01-18 14:17:05,575 INFO L226 Difference]: Without dead ends: 1070 [2022-01-18 14:17:05,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:05,575 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:05,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-18 14:17:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 971. [2022-01-18 14:17:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.6649484536082473) internal successors, (2585), 970 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2585 transitions. [2022-01-18 14:17:05,594 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2585 transitions. Word has length 23 [2022-01-18 14:17:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:05,595 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 2585 transitions. [2022-01-18 14:17:05,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2585 transitions. [2022-01-18 14:17:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:05,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:05,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:05,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:05,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 14:17:05,815 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1265080065, now seen corresponding path program 2 times [2022-01-18 14:17:05,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:05,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032015279] [2022-01-18 14:17:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:05,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:05,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032015279] [2022-01-18 14:17:05,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032015279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176055132] [2022-01-18 14:17:05,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:05,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:05,879 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:05,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 14:17:05,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:05,991 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:05,991 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 15 [2022-01-18 14:17:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176055132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:06,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:06,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-01-18 14:17:06,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783392653] [2022-01-18 14:17:06,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:06,031 INFO L87 Difference]: Start difference. First operand 971 states and 2585 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:06,216 INFO L93 Difference]: Finished difference Result 1173 states and 2980 transitions. [2022-01-18 14:17:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:06,220 INFO L225 Difference]: With dead ends: 1173 [2022-01-18 14:17:06,220 INFO L226 Difference]: Without dead ends: 1173 [2022-01-18 14:17:06,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:06,221 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:06,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-01-18 14:17:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 998. [2022-01-18 14:17:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.6559679037111334) internal successors, (2648), 997 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2648 transitions. [2022-01-18 14:17:06,241 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2648 transitions. Word has length 23 [2022-01-18 14:17:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:06,241 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2648 transitions. [2022-01-18 14:17:06,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2648 transitions. [2022-01-18 14:17:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:06,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:06,243 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:06,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:06,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 14:17:06,465 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 767996040, now seen corresponding path program 2 times [2022-01-18 14:17:06,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:06,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332851270] [2022-01-18 14:17:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:06,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:06,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:06,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332851270] [2022-01-18 14:17:06,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332851270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:06,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039204513] [2022-01-18 14:17:06,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:06,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:06,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:06,519 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 14:17:06,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:06,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:06,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:17:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:06,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:06,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039204513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:06,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:06,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 11 [2022-01-18 14:17:06,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421228598] [2022-01-18 14:17:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:17:06,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:17:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:06,768 INFO L87 Difference]: Start difference. First operand 998 states and 2648 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:06,934 INFO L93 Difference]: Finished difference Result 1682 states and 4299 transitions. [2022-01-18 14:17:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:17:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:06,941 INFO L225 Difference]: With dead ends: 1682 [2022-01-18 14:17:06,941 INFO L226 Difference]: Without dead ends: 1644 [2022-01-18 14:17:06,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:06,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:06,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 78 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-01-18 14:17:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1290. [2022-01-18 14:17:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 2.705973622963538) internal successors, (3488), 1289 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 3488 transitions. [2022-01-18 14:17:06,971 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 3488 transitions. Word has length 23 [2022-01-18 14:17:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:06,971 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 3488 transitions. [2022-01-18 14:17:06,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 3488 transitions. [2022-01-18 14:17:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:06,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:06,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:06,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:07,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 14:17:07,195 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1930655477, now seen corresponding path program 3 times [2022-01-18 14:17:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194042763] [2022-01-18 14:17:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:07,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:07,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:07,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194042763] [2022-01-18 14:17:07,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194042763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:07,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790154878] [2022-01-18 14:17:07,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:07,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:07,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:07,249 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:07,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 14:17:07,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:07,394 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:07,394 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 15 [2022-01-18 14:17:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:07,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790154878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:07,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:07,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-01-18 14:17:07,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615200910] [2022-01-18 14:17:07,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:07,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:07,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:07,421 INFO L87 Difference]: Start difference. First operand 1290 states and 3488 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:07,588 INFO L93 Difference]: Finished difference Result 1694 states and 4325 transitions. [2022-01-18 14:17:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:07,592 INFO L225 Difference]: With dead ends: 1694 [2022-01-18 14:17:07,592 INFO L226 Difference]: Without dead ends: 1680 [2022-01-18 14:17:07,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:07,593 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:07,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 105 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-01-18 14:17:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1364. [2022-01-18 14:17:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.68525311812179) internal successors, (3660), 1363 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3660 transitions. [2022-01-18 14:17:07,627 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3660 transitions. Word has length 23 [2022-01-18 14:17:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:07,627 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 3660 transitions. [2022-01-18 14:17:07,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3660 transitions. [2022-01-18 14:17:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:07,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:07,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:07,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:07,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:07,843 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash -863978827, now seen corresponding path program 3 times [2022-01-18 14:17:07,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:07,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087991313] [2022-01-18 14:17:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:07,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:07,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087991313] [2022-01-18 14:17:07,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087991313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:17:07,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:17:07,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:17:07,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757064736] [2022-01-18 14:17:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:17:07,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:17:07,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:17:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:07,900 INFO L87 Difference]: Start difference. First operand 1364 states and 3660 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:07,948 INFO L93 Difference]: Finished difference Result 1369 states and 3577 transitions. [2022-01-18 14:17:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:17:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:07,952 INFO L225 Difference]: With dead ends: 1369 [2022-01-18 14:17:07,952 INFO L226 Difference]: Without dead ends: 1327 [2022-01-18 14:17:07,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:17:07,952 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:07,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 33 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:17:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-01-18 14:17:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1287. [2022-01-18 14:17:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.6493001555209954) internal successors, (3407), 1286 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3407 transitions. [2022-01-18 14:17:07,977 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3407 transitions. Word has length 23 [2022-01-18 14:17:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:07,977 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3407 transitions. [2022-01-18 14:17:07,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3407 transitions. [2022-01-18 14:17:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:07,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:07,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:07,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-18 14:17:07,981 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1477515007, now seen corresponding path program 4 times [2022-01-18 14:17:07,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:07,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445258001] [2022-01-18 14:17:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:07,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:08,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445258001] [2022-01-18 14:17:08,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445258001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572113360] [2022-01-18 14:17:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:08,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:08,044 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:08,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 14:17:08,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:08,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:08,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:08,168 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:08,168 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 15 [2022-01-18 14:17:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572113360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:08,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-01-18 14:17:08,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33521591] [2022-01-18 14:17:08,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:08,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:08,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:08,193 INFO L87 Difference]: Start difference. First operand 1287 states and 3407 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:08,370 INFO L93 Difference]: Finished difference Result 1517 states and 3861 transitions. [2022-01-18 14:17:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:08,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:08,373 INFO L225 Difference]: With dead ends: 1517 [2022-01-18 14:17:08,373 INFO L226 Difference]: Without dead ends: 1505 [2022-01-18 14:17:08,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:08,373 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:08,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 141 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2022-01-18 14:17:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1300. [2022-01-18 14:17:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.647421093148576) internal successors, (3439), 1299 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3439 transitions. [2022-01-18 14:17:08,419 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3439 transitions. Word has length 23 [2022-01-18 14:17:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:08,420 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3439 transitions. [2022-01-18 14:17:08,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3439 transitions. [2022-01-18 14:17:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:08,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:08,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:08,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:08,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:08,633 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1626597001, now seen corresponding path program 17 times [2022-01-18 14:17:08,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:08,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180369274] [2022-01-18 14:17:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:08,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180369274] [2022-01-18 14:17:08,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180369274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773373737] [2022-01-18 14:17:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:08,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:08,668 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:08,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 14:17:08,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:17:08,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:08,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:09,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773373737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:09,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:09,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 16 [2022-01-18 14:17:09,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259921599] [2022-01-18 14:17:09,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:09,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:17:09,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:17:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:17:09,161 INFO L87 Difference]: Start difference. First operand 1300 states and 3439 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:09,798 INFO L93 Difference]: Finished difference Result 3312 states and 8391 transitions. [2022-01-18 14:17:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:17:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:09,806 INFO L225 Difference]: With dead ends: 3312 [2022-01-18 14:17:09,806 INFO L226 Difference]: Without dead ends: 3286 [2022-01-18 14:17:09,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:17:09,807 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 718 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 183 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-01-18 14:17:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1657. [2022-01-18 14:17:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 2.6932367149758454) internal successors, (4460), 1656 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 4460 transitions. [2022-01-18 14:17:09,860 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 4460 transitions. Word has length 23 [2022-01-18 14:17:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:09,860 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 4460 transitions. [2022-01-18 14:17:09,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 4460 transitions. [2022-01-18 14:17:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:09,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:09,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:09,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:10,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 14:17:10,079 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:10,079 INFO L85 PathProgramCache]: Analyzing trace with hash 664402327, now seen corresponding path program 5 times [2022-01-18 14:17:10,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:10,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898418609] [2022-01-18 14:17:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:10,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:10,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898418609] [2022-01-18 14:17:10,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898418609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523229620] [2022-01-18 14:17:10,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:10,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:10,123 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:10,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 14:17:10,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:17:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:10,257 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:10,258 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 20 treesize of output 19 [2022-01-18 14:17:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:10,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523229620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:10,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:10,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 14:17:10,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423984184] [2022-01-18 14:17:10,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:10,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:10,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:10,282 INFO L87 Difference]: Start difference. First operand 1657 states and 4460 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:10,504 INFO L93 Difference]: Finished difference Result 1975 states and 5089 transitions. [2022-01-18 14:17:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:17:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:10,508 INFO L225 Difference]: With dead ends: 1975 [2022-01-18 14:17:10,508 INFO L226 Difference]: Without dead ends: 1963 [2022-01-18 14:17:10,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:17:10,508 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:10,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 112 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-01-18 14:17:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1603. [2022-01-18 14:17:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.6766541822721597) internal successors, (4288), 1602 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4288 transitions. [2022-01-18 14:17:10,531 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4288 transitions. Word has length 23 [2022-01-18 14:17:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 4288 transitions. [2022-01-18 14:17:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4288 transitions. [2022-01-18 14:17:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:17:10,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:10,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:10,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 14:17:10,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-18 14:17:10,733 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1869408663, now seen corresponding path program 4 times [2022-01-18 14:17:10,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:10,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501011360] [2022-01-18 14:17:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:10,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:10,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501011360] [2022-01-18 14:17:10,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501011360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536480690] [2022-01-18 14:17:10,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:10,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:10,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:10,784 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:10,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 14:17:10,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:10,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:10,925 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:10,925 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 20 treesize of output 19 [2022-01-18 14:17:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:10,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536480690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:10,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:10,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-18 14:17:10,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151926810] [2022-01-18 14:17:10,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:10,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:17:10,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:17:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:10,957 INFO L87 Difference]: Start difference. First operand 1603 states and 4288 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:11,126 INFO L93 Difference]: Finished difference Result 1771 states and 4517 transitions. [2022-01-18 14:17:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:11,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:17:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:11,129 INFO L225 Difference]: With dead ends: 1771 [2022-01-18 14:17:11,130 INFO L226 Difference]: Without dead ends: 1683 [2022-01-18 14:17:11,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:11,130 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:11,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 105 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-01-18 14:17:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1115. [2022-01-18 14:17:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.5915619389587072) internal successors, (2887), 1114 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2887 transitions. [2022-01-18 14:17:11,152 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2887 transitions. Word has length 23 [2022-01-18 14:17:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:11,152 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2887 transitions. [2022-01-18 14:17:11,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2887 transitions. [2022-01-18 14:17:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:11,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:11,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:11,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:11,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 14:17:11,375 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1790576731, now seen corresponding path program 18 times [2022-01-18 14:17:11,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446075617] [2022-01-18 14:17:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:11,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:11,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:11,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446075617] [2022-01-18 14:17:11,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446075617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:11,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243341937] [2022-01-18 14:17:11,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:11,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:11,449 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:11,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 14:17:11,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:17:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:11,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:11,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:11,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243341937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:11,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:11,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:17:11,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724220807] [2022-01-18 14:17:11,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:11,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:11,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:11,741 INFO L87 Difference]: Start difference. First operand 1115 states and 2887 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:11,898 INFO L93 Difference]: Finished difference Result 1434 states and 3502 transitions. [2022-01-18 14:17:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:17:11,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:11,900 INFO L225 Difference]: With dead ends: 1434 [2022-01-18 14:17:11,901 INFO L226 Difference]: Without dead ends: 1434 [2022-01-18 14:17:11,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:11,901 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:11,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 83 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-01-18 14:17:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1165. [2022-01-18 14:17:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.5764604810996565) internal successors, (2999), 1164 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2999 transitions. [2022-01-18 14:17:11,922 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2999 transitions. Word has length 26 [2022-01-18 14:17:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:11,922 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2999 transitions. [2022-01-18 14:17:11,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2999 transitions. [2022-01-18 14:17:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:11,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:11,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:11,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:12,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:12,139 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash -537103826, now seen corresponding path program 19 times [2022-01-18 14:17:12,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:12,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142114431] [2022-01-18 14:17:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:12,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:12,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:12,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142114431] [2022-01-18 14:17:12,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142114431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652322982] [2022-01-18 14:17:12,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:12,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:12,188 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:12,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 14:17:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:12,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:12,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652322982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:12,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:12,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:17:12,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768817575] [2022-01-18 14:17:12,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:12,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:12,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:12,369 INFO L87 Difference]: Start difference. First operand 1165 states and 2999 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:12,489 INFO L93 Difference]: Finished difference Result 1449 states and 3568 transitions. [2022-01-18 14:17:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:17:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:12,492 INFO L225 Difference]: With dead ends: 1449 [2022-01-18 14:17:12,492 INFO L226 Difference]: Without dead ends: 1449 [2022-01-18 14:17:12,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:12,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:12,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 66 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-01-18 14:17:12,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1087. [2022-01-18 14:17:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.534990791896869) internal successors, (2753), 1086 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2753 transitions. [2022-01-18 14:17:12,511 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2753 transitions. Word has length 26 [2022-01-18 14:17:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:12,511 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2753 transitions. [2022-01-18 14:17:12,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2753 transitions. [2022-01-18 14:17:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:12,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:12,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:12,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 14:17:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 14:17:12,727 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1468920273, now seen corresponding path program 20 times [2022-01-18 14:17:12,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:12,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670960037] [2022-01-18 14:17:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:12,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:12,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670960037] [2022-01-18 14:17:12,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670960037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14218781] [2022-01-18 14:17:12,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:12,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:12,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:12,775 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:12,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 14:17:12,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:12,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:12,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:12,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:13,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14218781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:13,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:13,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:13,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334842279] [2022-01-18 14:17:13,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:13,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:13,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:13,008 INFO L87 Difference]: Start difference. First operand 1087 states and 2753 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:13,111 INFO L93 Difference]: Finished difference Result 1226 states and 3024 transitions. [2022-01-18 14:17:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:13,114 INFO L225 Difference]: With dead ends: 1226 [2022-01-18 14:17:13,114 INFO L226 Difference]: Without dead ends: 1223 [2022-01-18 14:17:13,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:13,115 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:13,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 50 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-01-18 14:17:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1087. [2022-01-18 14:17:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.534069981583794) internal successors, (2752), 1086 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2752 transitions. [2022-01-18 14:17:13,144 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2752 transitions. Word has length 26 [2022-01-18 14:17:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2752 transitions. [2022-01-18 14:17:13,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2752 transitions. [2022-01-18 14:17:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:13,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:13,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:13,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:13,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 14:17:13,367 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1453216515, now seen corresponding path program 21 times [2022-01-18 14:17:13,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:13,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820051805] [2022-01-18 14:17:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:13,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:13,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:13,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820051805] [2022-01-18 14:17:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820051805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597872857] [2022-01-18 14:17:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:13,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:13,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:13,415 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:13,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 14:17:13,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:17:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:13,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:13,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597872857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:13,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:13,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:13,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049026446] [2022-01-18 14:17:13,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:13,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:13,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:13,672 INFO L87 Difference]: Start difference. First operand 1087 states and 2752 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:13,786 INFO L93 Difference]: Finished difference Result 1535 states and 3703 transitions. [2022-01-18 14:17:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:13,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:13,788 INFO L225 Difference]: With dead ends: 1535 [2022-01-18 14:17:13,788 INFO L226 Difference]: Without dead ends: 1535 [2022-01-18 14:17:13,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:13,788 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:13,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 54 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-01-18 14:17:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1156. [2022-01-18 14:17:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.5567099567099567) internal successors, (2953), 1155 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2953 transitions. [2022-01-18 14:17:13,806 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2953 transitions. Word has length 26 [2022-01-18 14:17:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:13,806 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2953 transitions. [2022-01-18 14:17:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2953 transitions. [2022-01-18 14:17:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:13,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:13,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:13,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:14,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 14:17:14,029 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2030592720, now seen corresponding path program 22 times [2022-01-18 14:17:14,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:14,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327145236] [2022-01-18 14:17:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:14,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:14,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327145236] [2022-01-18 14:17:14,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327145236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083036514] [2022-01-18 14:17:14,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:14,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:14,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:14,082 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:14,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 14:17:14,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:14,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:14,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:14,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083036514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:14,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:14,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:17:14,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108789752] [2022-01-18 14:17:14,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:14,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:14,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:14,262 INFO L87 Difference]: Start difference. First operand 1156 states and 2953 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:14,366 INFO L93 Difference]: Finished difference Result 1523 states and 3745 transitions. [2022-01-18 14:17:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:14,368 INFO L225 Difference]: With dead ends: 1523 [2022-01-18 14:17:14,368 INFO L226 Difference]: Without dead ends: 1521 [2022-01-18 14:17:14,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:14,368 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:14,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 58 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-01-18 14:17:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1224. [2022-01-18 14:17:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.5756336876533115) internal successors, (3150), 1223 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3150 transitions. [2022-01-18 14:17:14,385 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3150 transitions. Word has length 26 [2022-01-18 14:17:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:14,385 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 3150 transitions. [2022-01-18 14:17:14,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3150 transitions. [2022-01-18 14:17:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:14,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:14,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:14,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:14,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 14:17:14,599 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1642494166, now seen corresponding path program 23 times [2022-01-18 14:17:14,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:14,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595381418] [2022-01-18 14:17:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:14,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:14,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595381418] [2022-01-18 14:17:14,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595381418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:14,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96551390] [2022-01-18 14:17:14,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:14,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:14,653 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:14,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 14:17:14,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:17:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:14,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:14,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96551390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:14,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:14,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-01-18 14:17:14,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664963165] [2022-01-18 14:17:14,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:14,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:14,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:14,831 INFO L87 Difference]: Start difference. First operand 1224 states and 3150 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:14,958 INFO L93 Difference]: Finished difference Result 1685 states and 4086 transitions. [2022-01-18 14:17:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:14,960 INFO L225 Difference]: With dead ends: 1685 [2022-01-18 14:17:14,960 INFO L226 Difference]: Without dead ends: 1685 [2022-01-18 14:17:14,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:17:14,961 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:14,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 68 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-01-18 14:17:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1229. [2022-01-18 14:17:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.574104234527687) internal successors, (3161), 1228 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3161 transitions. [2022-01-18 14:17:14,980 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3161 transitions. Word has length 26 [2022-01-18 14:17:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:14,980 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 3161 transitions. [2022-01-18 14:17:14,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3161 transitions. [2022-01-18 14:17:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:14,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:14,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:15,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 14:17:15,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 14:17:15,203 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash 710677719, now seen corresponding path program 24 times [2022-01-18 14:17:15,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:15,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778292737] [2022-01-18 14:17:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:15,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:15,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778292737] [2022-01-18 14:17:15,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778292737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164449610] [2022-01-18 14:17:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:15,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:15,261 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:15,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 14:17:15,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:17:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:15,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:15,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164449610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:15,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:15,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:15,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79704346] [2022-01-18 14:17:15,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:15,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:15,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:15,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:15,477 INFO L87 Difference]: Start difference. First operand 1229 states and 3161 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:15,568 INFO L93 Difference]: Finished difference Result 1544 states and 3762 transitions. [2022-01-18 14:17:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:15,570 INFO L225 Difference]: With dead ends: 1544 [2022-01-18 14:17:15,570 INFO L226 Difference]: Without dead ends: 1538 [2022-01-18 14:17:15,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:15,571 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:15,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 64 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-01-18 14:17:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1167. [2022-01-18 14:17:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.544596912521441) internal successors, (2967), 1166 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2967 transitions. [2022-01-18 14:17:15,585 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2967 transitions. Word has length 26 [2022-01-18 14:17:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:15,585 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 2967 transitions. [2022-01-18 14:17:15,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2967 transitions. [2022-01-18 14:17:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:15,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:15,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:15,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:15,789 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 4921710, now seen corresponding path program 25 times [2022-01-18 14:17:15,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163476316] [2022-01-18 14:17:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:15,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:15,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163476316] [2022-01-18 14:17:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163476316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513589732] [2022-01-18 14:17:15,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:15,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:15,842 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:15,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 14:17:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:15,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:16,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513589732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:16,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:16,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:17:16,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293021980] [2022-01-18 14:17:16,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:16,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:16,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:16,045 INFO L87 Difference]: Start difference. First operand 1167 states and 2967 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:16,181 INFO L93 Difference]: Finished difference Result 1554 states and 3721 transitions. [2022-01-18 14:17:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:16,183 INFO L225 Difference]: With dead ends: 1554 [2022-01-18 14:17:16,184 INFO L226 Difference]: Without dead ends: 1554 [2022-01-18 14:17:16,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:16,186 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:16,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 66 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-01-18 14:17:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1087. [2022-01-18 14:17:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.5211786372007365) internal successors, (2738), 1086 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2738 transitions. [2022-01-18 14:17:16,203 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2738 transitions. Word has length 26 [2022-01-18 14:17:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:16,204 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2738 transitions. [2022-01-18 14:17:16,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2738 transitions. [2022-01-18 14:17:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:16,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:16,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:16,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 14:17:16,423 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 917740285, now seen corresponding path program 26 times [2022-01-18 14:17:16,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:16,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899322442] [2022-01-18 14:17:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:16,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:16,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:16,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899322442] [2022-01-18 14:17:16,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899322442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:16,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713888301] [2022-01-18 14:17:16,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:16,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:16,475 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:16,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 14:17:16,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:16,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:16,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713888301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:16,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:17:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222381845] [2022-01-18 14:17:16,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:16,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:16,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:16,674 INFO L87 Difference]: Start difference. First operand 1087 states and 2738 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:16,780 INFO L93 Difference]: Finished difference Result 1323 states and 3197 transitions. [2022-01-18 14:17:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:16,782 INFO L225 Difference]: With dead ends: 1323 [2022-01-18 14:17:16,782 INFO L226 Difference]: Without dead ends: 1311 [2022-01-18 14:17:16,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:16,782 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:16,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 66 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-01-18 14:17:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1096. [2022-01-18 14:17:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.51689497716895) internal successors, (2756), 1095 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 2756 transitions. [2022-01-18 14:17:16,796 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 2756 transitions. Word has length 26 [2022-01-18 14:17:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:16,796 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 2756 transitions. [2022-01-18 14:17:16,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 2756 transitions. [2022-01-18 14:17:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:16,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:16,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:16,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:17,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:17,012 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1605831935, now seen corresponding path program 27 times [2022-01-18 14:17:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523165958] [2022-01-18 14:17:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:17,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:17,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523165958] [2022-01-18 14:17:17,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523165958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292409280] [2022-01-18 14:17:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:17,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:17,071 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:17,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 14:17:17,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:17,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:17,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292409280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:17,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:17,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-01-18 14:17:17,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033394352] [2022-01-18 14:17:17,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:17,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:17:17,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:17,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:17:17,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:17,697 INFO L87 Difference]: Start difference. First operand 1096 states and 2756 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:18,297 INFO L93 Difference]: Finished difference Result 1688 states and 3924 transitions. [2022-01-18 14:17:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 14:17:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:18,299 INFO L225 Difference]: With dead ends: 1688 [2022-01-18 14:17:18,299 INFO L226 Difference]: Without dead ends: 1664 [2022-01-18 14:17:18,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=1434, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 14:17:18,300 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 326 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:18,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 146 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-01-18 14:17:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 891. [2022-01-18 14:17:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.4685393258426966) internal successors, (2197), 890 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2197 transitions. [2022-01-18 14:17:18,312 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2197 transitions. Word has length 26 [2022-01-18 14:17:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:18,312 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2197 transitions. [2022-01-18 14:17:18,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2197 transitions. [2022-01-18 14:17:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:18,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:18,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:18,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 14:17:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 14:17:18,514 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1917033433, now seen corresponding path program 28 times [2022-01-18 14:17:18,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:18,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004750180] [2022-01-18 14:17:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:18,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:18,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004750180] [2022-01-18 14:17:18,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004750180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:18,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843926259] [2022-01-18 14:17:18,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:18,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:18,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:18,567 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:18,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 14:17:18,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:18,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:18,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:18,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843926259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:18,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:18,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:18,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30819655] [2022-01-18 14:17:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:18,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:18,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:18,813 INFO L87 Difference]: Start difference. First operand 891 states and 2197 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:18,910 INFO L93 Difference]: Finished difference Result 1285 states and 3019 transitions. [2022-01-18 14:17:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:18,912 INFO L225 Difference]: With dead ends: 1285 [2022-01-18 14:17:18,912 INFO L226 Difference]: Without dead ends: 1285 [2022-01-18 14:17:18,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:18,912 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:18,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-01-18 14:17:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 919. [2022-01-18 14:17:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.4901960784313726) internal successors, (2286), 918 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2286 transitions. [2022-01-18 14:17:18,923 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2286 transitions. Word has length 26 [2022-01-18 14:17:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:18,923 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2286 transitions. [2022-01-18 14:17:18,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2286 transitions. [2022-01-18 14:17:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:18,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:18,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:18,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:19,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 14:17:19,124 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1541302350, now seen corresponding path program 29 times [2022-01-18 14:17:19,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:19,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917610] [2022-01-18 14:17:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:19,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:19,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917610] [2022-01-18 14:17:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226300455] [2022-01-18 14:17:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:19,176 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:19,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 14:17:19,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:17:19,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:19,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226300455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:19,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:19,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 9 [2022-01-18 14:17:19,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294691108] [2022-01-18 14:17:19,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:19,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:19,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:19,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:19,344 INFO L87 Difference]: Start difference. First operand 919 states and 2286 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:19,478 INFO L93 Difference]: Finished difference Result 1336 states and 3149 transitions. [2022-01-18 14:17:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:19,480 INFO L225 Difference]: With dead ends: 1336 [2022-01-18 14:17:19,480 INFO L226 Difference]: Without dead ends: 1336 [2022-01-18 14:17:19,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:19,480 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:19,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 90 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-01-18 14:17:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 933. [2022-01-18 14:17:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.495708154506438) internal successors, (2326), 932 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2326 transitions. [2022-01-18 14:17:19,495 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2326 transitions. Word has length 26 [2022-01-18 14:17:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:19,495 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2326 transitions. [2022-01-18 14:17:19,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2326 transitions. [2022-01-18 14:17:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:19,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:19,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:19,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:19,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 14:17:19,711 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash -214039629, now seen corresponding path program 30 times [2022-01-18 14:17:19,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897882821] [2022-01-18 14:17:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:19,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:19,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897882821] [2022-01-18 14:17:19,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897882821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:19,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894550671] [2022-01-18 14:17:19,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:19,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:19,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:19,766 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:19,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 14:17:19,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:17:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:19,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:19,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:19,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894550671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:19,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:19,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649465408] [2022-01-18 14:17:19,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:19,969 INFO L87 Difference]: Start difference. First operand 933 states and 2326 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:20,101 INFO L93 Difference]: Finished difference Result 1294 states and 3044 transitions. [2022-01-18 14:17:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:17:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:20,104 INFO L225 Difference]: With dead ends: 1294 [2022-01-18 14:17:20,104 INFO L226 Difference]: Without dead ends: 1291 [2022-01-18 14:17:20,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:20,105 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:20,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-18 14:17:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 933. [2022-01-18 14:17:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.494635193133047) internal successors, (2325), 932 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2325 transitions. [2022-01-18 14:17:20,119 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2325 transitions. Word has length 26 [2022-01-18 14:17:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:20,120 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2325 transitions. [2022-01-18 14:17:20,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2325 transitions. [2022-01-18 14:17:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:20,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:20,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:20,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 14:17:20,335 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1116092490, now seen corresponding path program 31 times [2022-01-18 14:17:20,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059564239] [2022-01-18 14:17:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:20,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:20,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:20,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059564239] [2022-01-18 14:17:20,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059564239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:20,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761729706] [2022-01-18 14:17:20,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:20,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:20,387 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:20,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 14:17:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:20,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:17:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:20,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761729706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:20,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:20,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-01-18 14:17:20,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269032797] [2022-01-18 14:17:20,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:20,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:20,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:20,598 INFO L87 Difference]: Start difference. First operand 933 states and 2325 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:20,748 INFO L93 Difference]: Finished difference Result 1374 states and 3235 transitions. [2022-01-18 14:17:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:20,750 INFO L225 Difference]: With dead ends: 1374 [2022-01-18 14:17:20,750 INFO L226 Difference]: Without dead ends: 1374 [2022-01-18 14:17:20,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:20,751 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:20,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 82 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-01-18 14:17:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 911. [2022-01-18 14:17:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.4813186813186814) internal successors, (2258), 910 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2258 transitions. [2022-01-18 14:17:20,761 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2258 transitions. Word has length 26 [2022-01-18 14:17:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:20,761 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2258 transitions. [2022-01-18 14:17:20,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2258 transitions. [2022-01-18 14:17:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:20,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:20,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:20,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 14:17:20,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 14:17:20,963 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -6977063, now seen corresponding path program 32 times [2022-01-18 14:17:20,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:20,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512777248] [2022-01-18 14:17:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:20,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:21,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512777248] [2022-01-18 14:17:21,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512777248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947997910] [2022-01-18 14:17:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:21,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:21,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:21,013 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:21,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 14:17:21,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:21,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:21,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:21,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947997910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:21,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:21,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 14 [2022-01-18 14:17:21,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13086626] [2022-01-18 14:17:21,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:21,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:17:21,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:17:21,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:21,296 INFO L87 Difference]: Start difference. First operand 911 states and 2258 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:21,526 INFO L93 Difference]: Finished difference Result 1765 states and 4102 transitions. [2022-01-18 14:17:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:21,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:21,529 INFO L225 Difference]: With dead ends: 1765 [2022-01-18 14:17:21,529 INFO L226 Difference]: Without dead ends: 1717 [2022-01-18 14:17:21,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:17:21,529 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:21,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 141 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-01-18 14:17:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1116. [2022-01-18 14:17:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.553363228699552) internal successors, (2847), 1115 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2847 transitions. [2022-01-18 14:17:21,543 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2847 transitions. Word has length 26 [2022-01-18 14:17:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:21,543 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2847 transitions. [2022-01-18 14:17:21,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2847 transitions. [2022-01-18 14:17:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 14:17:21,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:21,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:21,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:21,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 14:17:21,745 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash -573902674, now seen corresponding path program 33 times [2022-01-18 14:17:21,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:21,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081236151] [2022-01-18 14:17:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:21,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:21,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081236151] [2022-01-18 14:17:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081236151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346077644] [2022-01-18 14:17:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:21,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:21,806 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:21,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 14:17:21,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:21,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:21,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:21,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:22,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:22,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346077644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:22,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:22,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-01-18 14:17:22,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34637942] [2022-01-18 14:17:22,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:22,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:17:22,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:17:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:17:22,698 INFO L87 Difference]: Start difference. First operand 1116 states and 2847 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:23,278 INFO L93 Difference]: Finished difference Result 1920 states and 4590 transitions. [2022-01-18 14:17:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:17:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 14:17:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:23,281 INFO L225 Difference]: With dead ends: 1920 [2022-01-18 14:17:23,281 INFO L226 Difference]: Without dead ends: 1911 [2022-01-18 14:17:23,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 14:17:23,282 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 285 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:23,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 116 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-01-18 14:17:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1254. [2022-01-18 14:17:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 2.5754189944134076) internal successors, (3227), 1253 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3227 transitions. [2022-01-18 14:17:23,297 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3227 transitions. Word has length 26 [2022-01-18 14:17:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:23,297 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3227 transitions. [2022-01-18 14:17:23,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3227 transitions. [2022-01-18 14:17:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:23,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:23,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:23,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:23,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-01-18 14:17:23,503 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash -726222136, now seen corresponding path program 5 times [2022-01-18 14:17:23,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:23,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694052343] [2022-01-18 14:17:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:23,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:23,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694052343] [2022-01-18 14:17:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694052343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878977530] [2022-01-18 14:17:23,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:23,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:23,558 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:23,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 14:17:23,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:17:23,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:23,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:23,684 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:23,685 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 20 treesize of output 19 [2022-01-18 14:17:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878977530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:23,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:17:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599661121] [2022-01-18 14:17:23,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:23,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:23,719 INFO L87 Difference]: Start difference. First operand 1254 states and 3227 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:23,969 INFO L93 Difference]: Finished difference Result 1654 states and 4038 transitions. [2022-01-18 14:17:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:23,972 INFO L225 Difference]: With dead ends: 1654 [2022-01-18 14:17:23,972 INFO L226 Difference]: Without dead ends: 1617 [2022-01-18 14:17:23,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:23,973 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:23,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 176 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-01-18 14:17:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1292. [2022-01-18 14:17:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.5615801704105343) internal successors, (3307), 1291 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3307 transitions. [2022-01-18 14:17:23,987 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3307 transitions. Word has length 29 [2022-01-18 14:17:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:23,987 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 3307 transitions. [2022-01-18 14:17:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3307 transitions. [2022-01-18 14:17:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:23,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:23,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:24,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:24,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:24,189 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:24,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1194274584, now seen corresponding path program 34 times [2022-01-18 14:17:24,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:24,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953261029] [2022-01-18 14:17:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:24,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:24,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953261029] [2022-01-18 14:17:24,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953261029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037401698] [2022-01-18 14:17:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:24,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:24,238 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:24,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 14:17:24,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:17:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:24,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:24,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037401698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:24,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:24,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-01-18 14:17:24,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164830078] [2022-01-18 14:17:24,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:24,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:24,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:24,424 INFO L87 Difference]: Start difference. First operand 1292 states and 3307 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:24,538 INFO L93 Difference]: Finished difference Result 1931 states and 4763 transitions. [2022-01-18 14:17:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:24,541 INFO L225 Difference]: With dead ends: 1931 [2022-01-18 14:17:24,541 INFO L226 Difference]: Without dead ends: 1900 [2022-01-18 14:17:24,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:24,542 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:24,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 95 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-01-18 14:17:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1551. [2022-01-18 14:17:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.5509677419354837) internal successors, (3954), 1550 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3954 transitions. [2022-01-18 14:17:24,594 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3954 transitions. Word has length 29 [2022-01-18 14:17:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:24,594 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3954 transitions. [2022-01-18 14:17:24,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3954 transitions. [2022-01-18 14:17:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:24,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:24,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:24,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:24,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 14:17:24,798 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:24,798 INFO L85 PathProgramCache]: Analyzing trace with hash -219424510, now seen corresponding path program 35 times [2022-01-18 14:17:24,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:24,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368058156] [2022-01-18 14:17:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:24,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:24,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368058156] [2022-01-18 14:17:24,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368058156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264727090] [2022-01-18 14:17:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:24,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:24,854 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:24,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 14:17:24,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:17:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:17:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:24,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:25,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264727090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:25,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:25,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-01-18 14:17:25,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530893974] [2022-01-18 14:17:25,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:25,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:25,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:25,062 INFO L87 Difference]: Start difference. First operand 1551 states and 3954 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:25,178 INFO L93 Difference]: Finished difference Result 2118 states and 5263 transitions. [2022-01-18 14:17:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:25,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:25,181 INFO L225 Difference]: With dead ends: 2118 [2022-01-18 14:17:25,181 INFO L226 Difference]: Without dead ends: 2083 [2022-01-18 14:17:25,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:25,181 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:25,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 95 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-01-18 14:17:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1641. [2022-01-18 14:17:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 2.5725609756097563) internal successors, (4219), 1640 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 4219 transitions. [2022-01-18 14:17:25,200 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 4219 transitions. Word has length 29 [2022-01-18 14:17:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:25,200 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 4219 transitions. [2022-01-18 14:17:25,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 4219 transitions. [2022-01-18 14:17:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:25,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:25,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:25,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:25,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:25,403 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1294668488, now seen corresponding path program 6 times [2022-01-18 14:17:25,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050148316] [2022-01-18 14:17:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:25,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:25,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:25,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050148316] [2022-01-18 14:17:25,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050148316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:25,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580407920] [2022-01-18 14:17:25,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:25,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:25,481 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:25,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 14:17:25,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:17:25,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:17:25,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:25,663 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 16 treesize of output 12 [2022-01-18 14:17:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:25,667 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 8 treesize of output 1 [2022-01-18 14:17:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:25,747 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:25,748 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 20 treesize of output 19 [2022-01-18 14:17:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:25,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580407920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:25,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:25,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 14:17:25,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549939695] [2022-01-18 14:17:25,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:25,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:25,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:25,785 INFO L87 Difference]: Start difference. First operand 1641 states and 4219 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:25,950 INFO L93 Difference]: Finished difference Result 1775 states and 4447 transitions. [2022-01-18 14:17:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:25,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:25,953 INFO L225 Difference]: With dead ends: 1775 [2022-01-18 14:17:25,954 INFO L226 Difference]: Without dead ends: 1728 [2022-01-18 14:17:25,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:25,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:25,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 108 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 304 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-01-18 14:17:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-01-18 14:17:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1619. [2022-01-18 14:17:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 2.5673671199011125) internal successors, (4154), 1618 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 4154 transitions. [2022-01-18 14:17:25,980 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 4154 transitions. Word has length 29 [2022-01-18 14:17:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:25,982 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 4154 transitions. [2022-01-18 14:17:25,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 4154 transitions. [2022-01-18 14:17:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:25,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:25,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:26,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:26,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:26,206 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 850939720, now seen corresponding path program 7 times [2022-01-18 14:17:26,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:26,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827242092] [2022-01-18 14:17:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:26,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:26,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827242092] [2022-01-18 14:17:26,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827242092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806307056] [2022-01-18 14:17:26,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:26,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:26,271 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:26,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:17:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:26,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:26,401 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:26,401 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 15 [2022-01-18 14:17:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806307056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:26,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:26,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:26,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134213554] [2022-01-18 14:17:26,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:26,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:26,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:26,448 INFO L87 Difference]: Start difference. First operand 1619 states and 4154 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:26,553 INFO L93 Difference]: Finished difference Result 1768 states and 4448 transitions. [2022-01-18 14:17:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:26,555 INFO L225 Difference]: With dead ends: 1768 [2022-01-18 14:17:26,555 INFO L226 Difference]: Without dead ends: 1751 [2022-01-18 14:17:26,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:26,556 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:26,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-01-18 14:17:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1632. [2022-01-18 14:17:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 2.570202329858982) internal successors, (4192), 1631 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 4192 transitions. [2022-01-18 14:17:26,573 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 4192 transitions. Word has length 29 [2022-01-18 14:17:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:26,573 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 4192 transitions. [2022-01-18 14:17:26,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 4192 transitions. [2022-01-18 14:17:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:26,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:26,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:26,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 14:17:26,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 14:17:26,791 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:26,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1992594714, now seen corresponding path program 6 times [2022-01-18 14:17:26,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:26,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929549306] [2022-01-18 14:17:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:26,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:26,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929549306] [2022-01-18 14:17:26,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929549306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787323645] [2022-01-18 14:17:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:26,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:26,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:26,849 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:26,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:17:26,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:17:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:26,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:26,964 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:26,965 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 15 [2022-01-18 14:17:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:27,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787323645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:27,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:27,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:27,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110907234] [2022-01-18 14:17:27,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:27,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:27,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:27,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:27,018 INFO L87 Difference]: Start difference. First operand 1632 states and 4192 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:27,168 INFO L93 Difference]: Finished difference Result 2079 states and 5118 transitions. [2022-01-18 14:17:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:27,172 INFO L225 Difference]: With dead ends: 2079 [2022-01-18 14:17:27,172 INFO L226 Difference]: Without dead ends: 2060 [2022-01-18 14:17:27,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:27,172 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:27,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 120 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-01-18 14:17:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1695. [2022-01-18 14:17:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 2.56198347107438) internal successors, (4340), 1694 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 4340 transitions. [2022-01-18 14:17:27,198 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 4340 transitions. Word has length 29 [2022-01-18 14:17:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:27,198 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 4340 transitions. [2022-01-18 14:17:27,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 4340 transitions. [2022-01-18 14:17:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:27,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:27,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:27,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:27,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 14:17:27,415 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash -492261722, now seen corresponding path program 8 times [2022-01-18 14:17:27,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883920552] [2022-01-18 14:17:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:27,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:27,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:27,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883920552] [2022-01-18 14:17:27,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883920552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765438552] [2022-01-18 14:17:27,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:27,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:27,479 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:27,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:17:27,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:27,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:27,579 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:27,579 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 15 [2022-01-18 14:17:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:27,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765438552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:27,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:27,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:17:27,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042913921] [2022-01-18 14:17:27,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:27,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:27,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:27,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:27,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:27,621 INFO L87 Difference]: Start difference. First operand 1695 states and 4340 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:27,756 INFO L93 Difference]: Finished difference Result 1956 states and 4825 transitions. [2022-01-18 14:17:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:27,758 INFO L225 Difference]: With dead ends: 1956 [2022-01-18 14:17:27,758 INFO L226 Difference]: Without dead ends: 1916 [2022-01-18 14:17:27,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:27,759 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:27,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-01-18 14:17:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1661. [2022-01-18 14:17:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 2.560843373493976) internal successors, (4251), 1660 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4251 transitions. [2022-01-18 14:17:27,778 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4251 transitions. Word has length 29 [2022-01-18 14:17:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 4251 transitions. [2022-01-18 14:17:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4251 transitions. [2022-01-18 14:17:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:27,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:27,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:27,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 14:17:27,981 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1105797902, now seen corresponding path program 9 times [2022-01-18 14:17:27,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:27,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309065903] [2022-01-18 14:17:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:27,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:17:28,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309065903] [2022-01-18 14:17:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309065903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741460115] [2022-01-18 14:17:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:28,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:28,036 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:28,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 14:17:28,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:17:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:28,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:17:28,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:28,150 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:28,150 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 15 [2022-01-18 14:17:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:17:28,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741460115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:28,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:28,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:28,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230005832] [2022-01-18 14:17:28,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:28,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:28,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:28,197 INFO L87 Difference]: Start difference. First operand 1661 states and 4251 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:28,315 INFO L93 Difference]: Finished difference Result 1977 states and 4908 transitions. [2022-01-18 14:17:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:28,318 INFO L225 Difference]: With dead ends: 1977 [2022-01-18 14:17:28,318 INFO L226 Difference]: Without dead ends: 1950 [2022-01-18 14:17:28,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:28,318 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:28,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 123 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-01-18 14:17:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1654. [2022-01-18 14:17:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 2.5620084694494856) internal successors, (4235), 1653 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 4235 transitions. [2022-01-18 14:17:28,336 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 4235 transitions. Word has length 29 [2022-01-18 14:17:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:28,337 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 4235 transitions. [2022-01-18 14:17:28,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 4235 transitions. [2022-01-18 14:17:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:28,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:28,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:28,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 14:17:28,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 14:17:28,540 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2014627176, now seen corresponding path program 36 times [2022-01-18 14:17:28,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:28,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992610074] [2022-01-18 14:17:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:28,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:28,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992610074] [2022-01-18 14:17:28,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992610074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668486903] [2022-01-18 14:17:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:28,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:28,601 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:28,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 14:17:28,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:17:28,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:28,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:28,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668486903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:28,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:28,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 14 [2022-01-18 14:17:28,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311918401] [2022-01-18 14:17:28,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:28,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:17:28,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:28,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:17:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:28,991 INFO L87 Difference]: Start difference. First operand 1654 states and 4235 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:29,690 INFO L93 Difference]: Finished difference Result 2960 states and 6965 transitions. [2022-01-18 14:17:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:17:29,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:29,695 INFO L225 Difference]: With dead ends: 2960 [2022-01-18 14:17:29,696 INFO L226 Difference]: Without dead ends: 2888 [2022-01-18 14:17:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:17:29,696 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 341 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:29,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 317 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:17:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2022-01-18 14:17:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 1716. [2022-01-18 14:17:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.551603498542274) internal successors, (4376), 1715 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4376 transitions. [2022-01-18 14:17:29,730 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4376 transitions. Word has length 29 [2022-01-18 14:17:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:29,730 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 4376 transitions. [2022-01-18 14:17:29,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4376 transitions. [2022-01-18 14:17:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:29,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:29,733 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:29,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:29,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 14:17:29,948 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1036119432, now seen corresponding path program 10 times [2022-01-18 14:17:29,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466519252] [2022-01-18 14:17:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:29,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:29,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:29,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466519252] [2022-01-18 14:17:29,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466519252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:29,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758663625] [2022-01-18 14:17:29,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:29,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:29,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:29,997 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:29,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 14:17:30,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:30,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:17:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:30,098 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 20 treesize of output 14 [2022-01-18 14:17:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:30,100 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 10 treesize of output 1 [2022-01-18 14:17:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:30,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:30,169 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:30,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:17:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:30,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758663625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:30,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:30,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-01-18 14:17:30,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917619968] [2022-01-18 14:17:30,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:30,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:17:30,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:17:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:30,269 INFO L87 Difference]: Start difference. First operand 1716 states and 4376 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:30,693 INFO L93 Difference]: Finished difference Result 3679 states and 8912 transitions. [2022-01-18 14:17:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:17:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:30,699 INFO L225 Difference]: With dead ends: 3679 [2022-01-18 14:17:30,699 INFO L226 Difference]: Without dead ends: 3596 [2022-01-18 14:17:30,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:17:30,700 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 320 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:30,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 282 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2022-01-18 14:17:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 2192. [2022-01-18 14:17:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.605659516202647) internal successors, (5709), 2191 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5709 transitions. [2022-01-18 14:17:30,741 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5709 transitions. Word has length 29 [2022-01-18 14:17:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:30,741 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 5709 transitions. [2022-01-18 14:17:30,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5709 transitions. [2022-01-18 14:17:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:30,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:30,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:30,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:30,963 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash -188205470, now seen corresponding path program 7 times [2022-01-18 14:17:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639955825] [2022-01-18 14:17:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:31,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:31,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639955825] [2022-01-18 14:17:31,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639955825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:31,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148770232] [2022-01-18 14:17:31,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:31,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:31,025 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:31,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 14:17:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:17:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:31,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:31,169 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 20 treesize of output 14 [2022-01-18 14:17:31,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:31,171 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 10 treesize of output 1 [2022-01-18 14:17:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:31,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:31,267 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:31,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:17:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:31,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148770232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:31,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:31,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-01-18 14:17:31,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004697504] [2022-01-18 14:17:31,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:31,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:17:31,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:17:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:31,345 INFO L87 Difference]: Start difference. First operand 2192 states and 5709 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:31,794 INFO L93 Difference]: Finished difference Result 4331 states and 10618 transitions. [2022-01-18 14:17:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:17:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:31,799 INFO L225 Difference]: With dead ends: 4331 [2022-01-18 14:17:31,799 INFO L226 Difference]: Without dead ends: 4271 [2022-01-18 14:17:31,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:17:31,803 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 327 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:31,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 374 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2022-01-18 14:17:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 2745. [2022-01-18 14:17:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 2.6450437317784257) internal successors, (7258), 2744 states have internal predecessors, (7258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 7258 transitions. [2022-01-18 14:17:31,846 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 7258 transitions. Word has length 29 [2022-01-18 14:17:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:31,846 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 7258 transitions. [2022-01-18 14:17:31,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 7258 transitions. [2022-01-18 14:17:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:31,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:31,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:31,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 14:17:32,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:32,050 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1821501854, now seen corresponding path program 11 times [2022-01-18 14:17:32,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:32,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153403843] [2022-01-18 14:17:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:32,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:32,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153403843] [2022-01-18 14:17:32,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153403843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73358663] [2022-01-18 14:17:32,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:32,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:32,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:32,114 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:32,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 14:17:32,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:17:32,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:32,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:32,309 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:32,310 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 20 treesize of output 19 [2022-01-18 14:17:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:32,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73358663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:32,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:32,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 14:17:32,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694781999] [2022-01-18 14:17:32,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:32,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:32,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:32,347 INFO L87 Difference]: Start difference. First operand 2745 states and 7258 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:32,440 INFO L93 Difference]: Finished difference Result 2931 states and 7615 transitions. [2022-01-18 14:17:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:17:32,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:32,444 INFO L225 Difference]: With dead ends: 2931 [2022-01-18 14:17:32,444 INFO L226 Difference]: Without dead ends: 2908 [2022-01-18 14:17:32,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:32,444 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:32,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-01-18 14:17:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2022-01-18 14:17:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2736. [2022-01-18 14:17:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 2.6453382084095063) internal successors, (7235), 2735 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 7235 transitions. [2022-01-18 14:17:32,477 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 7235 transitions. Word has length 29 [2022-01-18 14:17:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:32,477 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 7235 transitions. [2022-01-18 14:17:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 7235 transitions. [2022-01-18 14:17:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:32,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:32,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:32,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 14:17:32,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:32,681 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1968094858, now seen corresponding path program 8 times [2022-01-18 14:17:32,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:32,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874370098] [2022-01-18 14:17:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:32,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:32,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:32,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874370098] [2022-01-18 14:17:32,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874370098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:32,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738300986] [2022-01-18 14:17:32,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:32,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:32,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:32,739 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 14:17:32,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:32,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:32,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:32,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:32,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:32,877 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:32,877 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 15 [2022-01-18 14:17:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:32,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738300986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:32,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:32,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 14:17:32,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868989463] [2022-01-18 14:17:32,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:32,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:32,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:32,927 INFO L87 Difference]: Start difference. First operand 2736 states and 7235 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:33,095 INFO L93 Difference]: Finished difference Result 3236 states and 8301 transitions. [2022-01-18 14:17:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:33,101 INFO L225 Difference]: With dead ends: 3236 [2022-01-18 14:17:33,101 INFO L226 Difference]: Without dead ends: 3226 [2022-01-18 14:17:33,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:33,102 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:33,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 115 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2022-01-18 14:17:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2784. [2022-01-18 14:17:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 2.643190801293568) internal successors, (7356), 2783 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 7356 transitions. [2022-01-18 14:17:33,154 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 7356 transitions. Word has length 29 [2022-01-18 14:17:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:33,154 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 7356 transitions. [2022-01-18 14:17:33,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 7356 transitions. [2022-01-18 14:17:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:33,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:33,158 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:33,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:33,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:33,376 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -826539446, now seen corresponding path program 12 times [2022-01-18 14:17:33,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:33,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775037644] [2022-01-18 14:17:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:33,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:33,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775037644] [2022-01-18 14:17:33,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775037644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193044533] [2022-01-18 14:17:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:33,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:33,431 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:33,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 14:17:33,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:17:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:17:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:33,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:33,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:33,549 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 15 [2022-01-18 14:17:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:33,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193044533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:33,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:33,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:17:33,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656351521] [2022-01-18 14:17:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:33,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:17:33,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:33,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:17:33,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:17:33,588 INFO L87 Difference]: Start difference. First operand 2784 states and 7356 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:33,724 INFO L93 Difference]: Finished difference Result 3210 states and 8180 transitions. [2022-01-18 14:17:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:17:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:33,728 INFO L225 Difference]: With dead ends: 3210 [2022-01-18 14:17:33,728 INFO L226 Difference]: Without dead ends: 3141 [2022-01-18 14:17:33,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:33,728 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:33,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 115 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2022-01-18 14:17:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 2767. [2022-01-18 14:17:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 2.63412870571222) internal successors, (7286), 2766 states have internal predecessors, (7286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 7286 transitions. [2022-01-18 14:17:33,757 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 7286 transitions. Word has length 29 [2022-01-18 14:17:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:33,758 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 7286 transitions. [2022-01-18 14:17:33,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 7286 transitions. [2022-01-18 14:17:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:33,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:33,760 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:33,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 14:17:33,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 14:17:33,961 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1597375113, now seen corresponding path program 9 times [2022-01-18 14:17:33,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:33,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589838092] [2022-01-18 14:17:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:33,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:34,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589838092] [2022-01-18 14:17:34,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589838092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555625747] [2022-01-18 14:17:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:34,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:34,011 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:34,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:17:34,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:17:34,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:34,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 14:17:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:34,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:34,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555625747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:34,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:34,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 14:17:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717544502] [2022-01-18 14:17:34,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:34,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:17:34,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:17:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:34,225 INFO L87 Difference]: Start difference. First operand 2767 states and 7286 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:34,401 INFO L93 Difference]: Finished difference Result 3548 states and 9044 transitions. [2022-01-18 14:17:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:34,405 INFO L225 Difference]: With dead ends: 3548 [2022-01-18 14:17:34,405 INFO L226 Difference]: Without dead ends: 3514 [2022-01-18 14:17:34,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:17:34,406 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 164 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:34,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 111 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2022-01-18 14:17:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2924. [2022-01-18 14:17:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.62777967841259) internal successors, (7681), 2923 states have internal predecessors, (7681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 7681 transitions. [2022-01-18 14:17:34,471 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 7681 transitions. Word has length 29 [2022-01-18 14:17:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:34,471 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 7681 transitions. [2022-01-18 14:17:34,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 7681 transitions. [2022-01-18 14:17:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:34,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:34,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:34,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:34,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 14:17:34,682 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1835185986, now seen corresponding path program 37 times [2022-01-18 14:17:34,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:34,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313752161] [2022-01-18 14:17:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:34,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:34,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:34,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313752161] [2022-01-18 14:17:34,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313752161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:34,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876123959] [2022-01-18 14:17:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:34,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:34,725 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:17:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:17:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:34,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:34,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876123959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:34,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:34,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-01-18 14:17:34,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321853408] [2022-01-18 14:17:34,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:34,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:17:34,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:17:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:34,886 INFO L87 Difference]: Start difference. First operand 2924 states and 7681 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:34,995 INFO L93 Difference]: Finished difference Result 3346 states and 8612 transitions. [2022-01-18 14:17:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:17:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:34,999 INFO L225 Difference]: With dead ends: 3346 [2022-01-18 14:17:34,999 INFO L226 Difference]: Without dead ends: 3301 [2022-01-18 14:17:34,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:17:35,000 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:35,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 92 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-01-18 14:17:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 3007. [2022-01-18 14:17:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 2.6167664670658684) internal successors, (7866), 3006 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 7866 transitions. [2022-01-18 14:17:35,036 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 7866 transitions. Word has length 29 [2022-01-18 14:17:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:35,036 INFO L470 AbstractCegarLoop]: Abstraction has 3007 states and 7866 transitions. [2022-01-18 14:17:35,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 7866 transitions. [2022-01-18 14:17:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:35,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:35,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:35,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 14:17:35,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 14:17:35,251 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 856678242, now seen corresponding path program 13 times [2022-01-18 14:17:35,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68262077] [2022-01-18 14:17:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:35,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:35,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:35,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68262077] [2022-01-18 14:17:35,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68262077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:35,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263648990] [2022-01-18 14:17:35,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:35,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:35,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:35,313 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:35,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:17:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:35,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:35,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:35,453 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:35,454 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 20 treesize of output 19 [2022-01-18 14:17:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:35,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263648990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:35,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:35,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:17:35,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198772915] [2022-01-18 14:17:35,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:35,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:35,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:35,496 INFO L87 Difference]: Start difference. First operand 3007 states and 7866 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:35,712 INFO L93 Difference]: Finished difference Result 3544 states and 9002 transitions. [2022-01-18 14:17:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:35,717 INFO L225 Difference]: With dead ends: 3544 [2022-01-18 14:17:35,717 INFO L226 Difference]: Without dead ends: 3469 [2022-01-18 14:17:35,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:35,718 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:35,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 92 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2022-01-18 14:17:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3058. [2022-01-18 14:17:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3057 states have (on average 2.596990513575401) internal successors, (7939), 3057 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 7939 transitions. [2022-01-18 14:17:35,756 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 7939 transitions. Word has length 29 [2022-01-18 14:17:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 7939 transitions. [2022-01-18 14:17:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 7939 transitions. [2022-01-18 14:17:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:17:35,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:35,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:35,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 14:17:35,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:35,959 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:35,959 INFO L85 PathProgramCache]: Analyzing trace with hash 718658832, now seen corresponding path program 14 times [2022-01-18 14:17:35,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:35,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122635800] [2022-01-18 14:17:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:35,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:36,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:36,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122635800] [2022-01-18 14:17:36,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122635800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:36,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588679398] [2022-01-18 14:17:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:36,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:36,067 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:36,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:17:36,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:36,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:36,226 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:36,226 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 20 treesize of output 19 [2022-01-18 14:17:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:36,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588679398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:36,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:36,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 14:17:36,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46990760] [2022-01-18 14:17:36,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:36,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:36,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:36,258 INFO L87 Difference]: Start difference. First operand 3058 states and 7939 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:36,426 INFO L93 Difference]: Finished difference Result 3332 states and 8457 transitions. [2022-01-18 14:17:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:17:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:36,442 INFO L225 Difference]: With dead ends: 3332 [2022-01-18 14:17:36,442 INFO L226 Difference]: Without dead ends: 3286 [2022-01-18 14:17:36,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:36,442 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:36,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 114 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-01-18 14:17:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3041. [2022-01-18 14:17:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 2.599671052631579) internal successors, (7903), 3040 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 7903 transitions. [2022-01-18 14:17:36,473 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 7903 transitions. Word has length 29 [2022-01-18 14:17:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:36,473 INFO L470 AbstractCegarLoop]: Abstraction has 3041 states and 7903 transitions. [2022-01-18 14:17:36,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 7903 transitions. [2022-01-18 14:17:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:17:36,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:36,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:36,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 14:17:36,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:36,676 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -739301394, now seen corresponding path program 38 times [2022-01-18 14:17:36,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943210339] [2022-01-18 14:17:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:36,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:36,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:36,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943210339] [2022-01-18 14:17:36,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943210339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:36,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884435067] [2022-01-18 14:17:36,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:36,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:36,771 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:36,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:17:36,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:36,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:17:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:36,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:37,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884435067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:37,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:37,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 11 [2022-01-18 14:17:37,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227652767] [2022-01-18 14:17:37,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:37,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:17:37,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:17:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:37,158 INFO L87 Difference]: Start difference. First operand 3041 states and 7903 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:37,420 INFO L93 Difference]: Finished difference Result 3608 states and 9020 transitions. [2022-01-18 14:17:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:17:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:17:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:37,426 INFO L225 Difference]: With dead ends: 3608 [2022-01-18 14:17:37,427 INFO L226 Difference]: Without dead ends: 3608 [2022-01-18 14:17:37,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:37,427 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 158 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:37,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 111 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-01-18 14:17:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3046. [2022-01-18 14:17:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 2.5891625615763547) internal successors, (7884), 3045 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 7884 transitions. [2022-01-18 14:17:37,476 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 7884 transitions. Word has length 32 [2022-01-18 14:17:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:37,477 INFO L470 AbstractCegarLoop]: Abstraction has 3046 states and 7884 transitions. [2022-01-18 14:17:37,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 7884 transitions. [2022-01-18 14:17:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 14:17:37,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:37,480 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:37,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 14:17:37,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 14:17:37,702 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash -178434399, now seen corresponding path program 39 times [2022-01-18 14:17:37,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:37,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304042510] [2022-01-18 14:17:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:37,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:37,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304042510] [2022-01-18 14:17:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304042510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138683586] [2022-01-18 14:17:37,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:37,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:37,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:37,761 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:37,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:17:37,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:17:37,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:17:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:17:38,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-18 14:17:38,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138683586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:38,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:38,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-01-18 14:17:38,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508771978] [2022-01-18 14:17:38,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:38,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:17:38,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:17:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:38,625 INFO L87 Difference]: Start difference. First operand 3046 states and 7884 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:39,487 INFO L93 Difference]: Finished difference Result 4500 states and 10890 transitions. [2022-01-18 14:17:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:17:39,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 14:17:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:39,492 INFO L225 Difference]: With dead ends: 4500 [2022-01-18 14:17:39,493 INFO L226 Difference]: Without dead ends: 4477 [2022-01-18 14:17:39,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=1999, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 14:17:39,493 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 696 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:39,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 140 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:17:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2022-01-18 14:17:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2907. [2022-01-18 14:17:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2906 states have (on average 2.55230557467309) internal successors, (7417), 2906 states have internal predecessors, (7417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 7417 transitions. [2022-01-18 14:17:39,533 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 7417 transitions. Word has length 32 [2022-01-18 14:17:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:39,533 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 7417 transitions. [2022-01-18 14:17:39,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 7417 transitions. [2022-01-18 14:17:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:39,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:39,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:39,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 14:17:39,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:39,736 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1854825621, now seen corresponding path program 10 times [2022-01-18 14:17:39,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:39,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330159022] [2022-01-18 14:17:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:39,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330159022] [2022-01-18 14:17:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330159022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24683514] [2022-01-18 14:17:39,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:39,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:39,809 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:39,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:17:39,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:39,950 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:39,950 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 20 treesize of output 19 [2022-01-18 14:17:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:39,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24683514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:39,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:39,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:17:39,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729272165] [2022-01-18 14:17:39,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:39,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:39,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:39,999 INFO L87 Difference]: Start difference. First operand 2907 states and 7417 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:40,366 INFO L93 Difference]: Finished difference Result 3636 states and 8898 transitions. [2022-01-18 14:17:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:40,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:40,372 INFO L225 Difference]: With dead ends: 3636 [2022-01-18 14:17:40,372 INFO L226 Difference]: Without dead ends: 3603 [2022-01-18 14:17:40,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:17:40,373 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 220 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:40,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 245 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-01-18 14:17:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2856. [2022-01-18 14:17:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.5597197898423816) internal successors, (7308), 2855 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 7308 transitions. [2022-01-18 14:17:40,406 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 7308 transitions. Word has length 35 [2022-01-18 14:17:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:40,406 INFO L470 AbstractCegarLoop]: Abstraction has 2856 states and 7308 transitions. [2022-01-18 14:17:40,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 7308 transitions. [2022-01-18 14:17:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:40,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:40,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:40,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 14:17:40,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:40,610 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -972961707, now seen corresponding path program 15 times [2022-01-18 14:17:40,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:40,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205575306] [2022-01-18 14:17:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:40,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:40,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:40,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205575306] [2022-01-18 14:17:40,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205575306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:40,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107777904] [2022-01-18 14:17:40,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:40,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:40,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:40,717 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:40,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:17:40,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:17:40,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:40,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:41,043 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:41,044 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 20 treesize of output 19 [2022-01-18 14:17:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:41,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107777904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:41,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:41,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 14:17:41,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811660863] [2022-01-18 14:17:41,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:41,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:17:41,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:17:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:17:41,083 INFO L87 Difference]: Start difference. First operand 2856 states and 7308 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:41,285 INFO L93 Difference]: Finished difference Result 3056 states and 7643 transitions. [2022-01-18 14:17:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:41,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:41,289 INFO L225 Difference]: With dead ends: 3056 [2022-01-18 14:17:41,289 INFO L226 Difference]: Without dead ends: 2989 [2022-01-18 14:17:41,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:17:41,289 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 117 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:41,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 242 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 535 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 14:17:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-01-18 14:17:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2847. [2022-01-18 14:17:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.555867884750527) internal successors, (7274), 2846 states have internal predecessors, (7274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7274 transitions. [2022-01-18 14:17:41,329 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7274 transitions. Word has length 35 [2022-01-18 14:17:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:41,329 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7274 transitions. [2022-01-18 14:17:41,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7274 transitions. [2022-01-18 14:17:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:41,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:41,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:41,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:41,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-18 14:17:41,553 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash -800888287, now seen corresponding path program 16 times [2022-01-18 14:17:41,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104661649] [2022-01-18 14:17:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:41,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104661649] [2022-01-18 14:17:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104661649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504088249] [2022-01-18 14:17:41,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:41,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:41,628 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:41,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:17:41,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:41,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:41,763 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:41,764 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 15 [2022-01-18 14:17:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:41,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504088249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:41,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:41,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:17:41,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331137068] [2022-01-18 14:17:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:41,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:41,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:41,835 INFO L87 Difference]: Start difference. First operand 2847 states and 7274 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:42,008 INFO L93 Difference]: Finished difference Result 3126 states and 7799 transitions. [2022-01-18 14:17:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:42,017 INFO L225 Difference]: With dead ends: 3126 [2022-01-18 14:17:42,017 INFO L226 Difference]: Without dead ends: 3126 [2022-01-18 14:17:42,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:42,018 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:42,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 141 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-01-18 14:17:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2847. [2022-01-18 14:17:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.555867884750527) internal successors, (7274), 2846 states have internal predecessors, (7274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7274 transitions. [2022-01-18 14:17:42,056 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7274 transitions. Word has length 35 [2022-01-18 14:17:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:42,057 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7274 transitions. [2022-01-18 14:17:42,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7274 transitions. [2022-01-18 14:17:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:42,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:42,059 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:42,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 14:17:42,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:42,259 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 649055720, now seen corresponding path program 11 times [2022-01-18 14:17:42,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311630107] [2022-01-18 14:17:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:42,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:42,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311630107] [2022-01-18 14:17:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311630107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108413927] [2022-01-18 14:17:42,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:42,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:42,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:42,352 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:42,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:17:42,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:17:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:42,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108413927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:42,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:42,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 19 [2022-01-18 14:17:42,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606142986] [2022-01-18 14:17:42,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:42,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:17:42,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:42,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:17:42,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:17:42,686 INFO L87 Difference]: Start difference. First operand 2847 states and 7274 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:42,876 INFO L93 Difference]: Finished difference Result 3672 states and 8968 transitions. [2022-01-18 14:17:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:42,880 INFO L225 Difference]: With dead ends: 3672 [2022-01-18 14:17:42,880 INFO L226 Difference]: Without dead ends: 3632 [2022-01-18 14:17:42,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:17:42,880 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:42,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 123 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2022-01-18 14:17:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2685. [2022-01-18 14:17:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 2.5152757078986587) internal successors, (6751), 2684 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 6751 transitions. [2022-01-18 14:17:42,926 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 6751 transitions. Word has length 35 [2022-01-18 14:17:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:42,926 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 6751 transitions. [2022-01-18 14:17:42,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 6751 transitions. [2022-01-18 14:17:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:42,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:42,929 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:42,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:43,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 14:17:43,143 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1462970056, now seen corresponding path program 17 times [2022-01-18 14:17:43,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:43,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300587905] [2022-01-18 14:17:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:43,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:43,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300587905] [2022-01-18 14:17:43,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300587905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489882209] [2022-01-18 14:17:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:43,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:43,207 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:43,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 14:17:43,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:17:43,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:43,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:43,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489882209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:43,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:43,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 15 [2022-01-18 14:17:43,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174227533] [2022-01-18 14:17:43,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:43,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:17:43,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:17:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:43,471 INFO L87 Difference]: Start difference. First operand 2685 states and 6751 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:43,705 INFO L93 Difference]: Finished difference Result 3747 states and 9072 transitions. [2022-01-18 14:17:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:17:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:43,709 INFO L225 Difference]: With dead ends: 3747 [2022-01-18 14:17:43,709 INFO L226 Difference]: Without dead ends: 3693 [2022-01-18 14:17:43,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:17:43,710 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 266 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:43,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 155 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2022-01-18 14:17:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 2822. [2022-01-18 14:17:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2821 states have (on average 2.525345622119816) internal successors, (7124), 2821 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 7124 transitions. [2022-01-18 14:17:43,754 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 7124 transitions. Word has length 35 [2022-01-18 14:17:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 7124 transitions. [2022-01-18 14:17:43,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 7124 transitions. [2022-01-18 14:17:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:43,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:43,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:43,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:43,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 14:17:43,957 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1763440021, now seen corresponding path program 18 times [2022-01-18 14:17:43,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:43,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023763903] [2022-01-18 14:17:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:43,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:44,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:44,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023763903] [2022-01-18 14:17:44,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023763903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:44,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249033643] [2022-01-18 14:17:44,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:44,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:44,026 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:44,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 14:17:44,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 14:17:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:44,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:44,167 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:44,167 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 15 [2022-01-18 14:17:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:44,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249033643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:44,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:44,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:17:44,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053465016] [2022-01-18 14:17:44,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:44,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:44,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:44,231 INFO L87 Difference]: Start difference. First operand 2822 states and 7124 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:44,418 INFO L93 Difference]: Finished difference Result 3193 states and 7855 transitions. [2022-01-18 14:17:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:44,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:44,422 INFO L225 Difference]: With dead ends: 3193 [2022-01-18 14:17:44,422 INFO L226 Difference]: Without dead ends: 3120 [2022-01-18 14:17:44,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:44,422 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:44,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-01-18 14:17:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2828. [2022-01-18 14:17:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.5107888220728687) internal successors, (7098), 2827 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7098 transitions. [2022-01-18 14:17:44,452 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7098 transitions. Word has length 35 [2022-01-18 14:17:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:44,452 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 7098 transitions. [2022-01-18 14:17:44,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7098 transitions. [2022-01-18 14:17:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:44,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:44,454 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:44,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 14:17:44,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,655 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1241207638, now seen corresponding path program 12 times [2022-01-18 14:17:44,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:44,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471120462] [2022-01-18 14:17:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:44,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:44,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:44,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471120462] [2022-01-18 14:17:44,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471120462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:44,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247828338] [2022-01-18 14:17:44,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:44,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:44,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:44,732 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:44,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 14:17:44,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:17:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:44,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:45,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247828338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:45,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:45,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-01-18 14:17:45,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452366444] [2022-01-18 14:17:45,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:45,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:17:45,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:17:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:45,033 INFO L87 Difference]: Start difference. First operand 2828 states and 7098 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:45,283 INFO L93 Difference]: Finished difference Result 4521 states and 11004 transitions. [2022-01-18 14:17:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:17:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:45,289 INFO L225 Difference]: With dead ends: 4521 [2022-01-18 14:17:45,289 INFO L226 Difference]: Without dead ends: 4497 [2022-01-18 14:17:45,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:17:45,289 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 163 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2022-01-18 14:17:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3230. [2022-01-18 14:17:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 2.573552183338495) internal successors, (8310), 3229 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 8310 transitions. [2022-01-18 14:17:45,357 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 8310 transitions. Word has length 35 [2022-01-18 14:17:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:45,357 INFO L470 AbstractCegarLoop]: Abstraction has 3230 states and 8310 transitions. [2022-01-18 14:17:45,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 8310 transitions. [2022-01-18 14:17:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:45,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:45,359 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:45,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 14:17:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:45,560 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1863088048, now seen corresponding path program 13 times [2022-01-18 14:17:45,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:45,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198757256] [2022-01-18 14:17:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:45,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:45,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198757256] [2022-01-18 14:17:45,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198757256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657631781] [2022-01-18 14:17:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:45,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:45,620 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:45,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 14:17:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:45,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:45,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657631781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:45,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:45,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 14:17:45,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142814108] [2022-01-18 14:17:45,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:45,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:17:45,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:17:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:17:45,896 INFO L87 Difference]: Start difference. First operand 3230 states and 8310 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:46,143 INFO L93 Difference]: Finished difference Result 4879 states and 11741 transitions. [2022-01-18 14:17:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:17:46,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:46,149 INFO L225 Difference]: With dead ends: 4879 [2022-01-18 14:17:46,149 INFO L226 Difference]: Without dead ends: 4879 [2022-01-18 14:17:46,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:17:46,149 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:46,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 127 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-01-18 14:17:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 3069. [2022-01-18 14:17:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 2.5642112125162972) internal successors, (7867), 3068 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 7867 transitions. [2022-01-18 14:17:46,191 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 7867 transitions. Word has length 35 [2022-01-18 14:17:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:46,191 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 7867 transitions. [2022-01-18 14:17:46,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 7867 transitions. [2022-01-18 14:17:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:46,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:46,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:46,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 14:17:46,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 14:17:46,394 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1764899259, now seen corresponding path program 14 times [2022-01-18 14:17:46,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108845337] [2022-01-18 14:17:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:46,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:46,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:46,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108845337] [2022-01-18 14:17:46,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108845337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131341382] [2022-01-18 14:17:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:46,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:46,464 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:46,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 14:17:46,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:46,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:46,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:46,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:46,597 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:46,597 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 15 [2022-01-18 14:17:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131341382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:46,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:46,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:17:46,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46642661] [2022-01-18 14:17:46,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:46,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:46,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:46,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:46,658 INFO L87 Difference]: Start difference. First operand 3069 states and 7867 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:46,824 INFO L93 Difference]: Finished difference Result 3861 states and 9520 transitions. [2022-01-18 14:17:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:46,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:46,829 INFO L225 Difference]: With dead ends: 3861 [2022-01-18 14:17:46,829 INFO L226 Difference]: Without dead ends: 3841 [2022-01-18 14:17:46,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:46,829 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:46,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 157 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2022-01-18 14:17:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3043. [2022-01-18 14:17:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.553911900065746) internal successors, (7769), 3042 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 7769 transitions. [2022-01-18 14:17:46,891 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 7769 transitions. Word has length 35 [2022-01-18 14:17:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:46,891 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 7769 transitions. [2022-01-18 14:17:46,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 7769 transitions. [2022-01-18 14:17:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:46,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:46,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:46,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 14:17:47,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 14:17:47,103 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1029735045, now seen corresponding path program 19 times [2022-01-18 14:17:47,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:47,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862548177] [2022-01-18 14:17:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:47,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:47,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:47,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862548177] [2022-01-18 14:17:47,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862548177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:47,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434191563] [2022-01-18 14:17:47,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:47,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:47,169 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:47,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 14:17:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:47,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:47,289 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:47,289 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 15 [2022-01-18 14:17:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:47,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434191563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:47,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:47,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:17:47,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590281322] [2022-01-18 14:17:47,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:47,348 INFO L87 Difference]: Start difference. First operand 3043 states and 7769 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:47,563 INFO L93 Difference]: Finished difference Result 3496 states and 8631 transitions. [2022-01-18 14:17:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:47,567 INFO L225 Difference]: With dead ends: 3496 [2022-01-18 14:17:47,567 INFO L226 Difference]: Without dead ends: 3430 [2022-01-18 14:17:47,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:47,568 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 70 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:47,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 213 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2022-01-18 14:17:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 2999. [2022-01-18 14:17:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.543695797198132) internal successors, (7626), 2998 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 7626 transitions. [2022-01-18 14:17:47,600 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 7626 transitions. Word has length 35 [2022-01-18 14:17:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:47,601 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 7626 transitions. [2022-01-18 14:17:47,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 7626 transitions. [2022-01-18 14:17:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:47,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:47,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:47,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 14:17:47,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:47,806 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash 653482643, now seen corresponding path program 20 times [2022-01-18 14:17:47,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:47,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572771414] [2022-01-18 14:17:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:47,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:47,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572771414] [2022-01-18 14:17:47,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572771414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362181462] [2022-01-18 14:17:47,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:47,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:47,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:47,886 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:47,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 14:17:47,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:47,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:47,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:48,029 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:48,029 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 20 treesize of output 19 [2022-01-18 14:17:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:48,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362181462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:48,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:48,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:17:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348620816] [2022-01-18 14:17:48,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:48,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:48,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:48,079 INFO L87 Difference]: Start difference. First operand 2999 states and 7626 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:48,315 INFO L93 Difference]: Finished difference Result 3778 states and 9159 transitions. [2022-01-18 14:17:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:48,319 INFO L225 Difference]: With dead ends: 3778 [2022-01-18 14:17:48,319 INFO L226 Difference]: Without dead ends: 3706 [2022-01-18 14:17:48,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:17:48,320 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 160 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:48,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 218 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2022-01-18 14:17:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3002. [2022-01-18 14:17:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.525824725091636) internal successors, (7580), 3001 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 7580 transitions. [2022-01-18 14:17:48,349 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 7580 transitions. Word has length 35 [2022-01-18 14:17:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:48,349 INFO L470 AbstractCegarLoop]: Abstraction has 3002 states and 7580 transitions. [2022-01-18 14:17:48,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 7580 transitions. [2022-01-18 14:17:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:48,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:48,352 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:48,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 14:17:48,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:48,552 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash 760940392, now seen corresponding path program 15 times [2022-01-18 14:17:48,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:48,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286154865] [2022-01-18 14:17:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:48,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:48,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286154865] [2022-01-18 14:17:48,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286154865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:48,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498033211] [2022-01-18 14:17:48,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:48,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:48,631 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:48,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 14:17:48,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:17:48,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:48,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:48,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498033211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:48,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:48,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:17:48,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007677702] [2022-01-18 14:17:48,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:48,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:17:48,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:17:48,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:48,963 INFO L87 Difference]: Start difference. First operand 3002 states and 7580 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:49,305 INFO L93 Difference]: Finished difference Result 4480 states and 10890 transitions. [2022-01-18 14:17:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:17:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:49,310 INFO L225 Difference]: With dead ends: 4480 [2022-01-18 14:17:49,310 INFO L226 Difference]: Without dead ends: 4480 [2022-01-18 14:17:49,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:17:49,311 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 242 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:49,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 167 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2022-01-18 14:17:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 3156. [2022-01-18 14:17:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 2.555309033280507) internal successors, (8062), 3155 states have internal predecessors, (8062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 8062 transitions. [2022-01-18 14:17:49,352 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 8062 transitions. Word has length 35 [2022-01-18 14:17:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:49,353 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 8062 transitions. [2022-01-18 14:17:49,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 8062 transitions. [2022-01-18 14:17:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:49,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:49,356 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:49,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:49,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-01-18 14:17:49,571 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:49,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1040085320, now seen corresponding path program 21 times [2022-01-18 14:17:49,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:49,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517661118] [2022-01-18 14:17:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:49,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:49,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:49,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517661118] [2022-01-18 14:17:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517661118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:49,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426504340] [2022-01-18 14:17:49,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:49,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:49,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:49,653 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:49,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 14:17:49,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:17:49,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:49,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:17:49,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426504340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:49,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:49,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-01-18 14:17:49,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75967129] [2022-01-18 14:17:49,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:49,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:17:49,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:17:49,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:17:49,927 INFO L87 Difference]: Start difference. First operand 3156 states and 8062 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:50,122 INFO L93 Difference]: Finished difference Result 4155 states and 10324 transitions. [2022-01-18 14:17:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:17:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:50,126 INFO L225 Difference]: With dead ends: 4155 [2022-01-18 14:17:50,127 INFO L226 Difference]: Without dead ends: 4072 [2022-01-18 14:17:50,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:17:50,127 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 199 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:50,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 99 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2022-01-18 14:17:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 3305. [2022-01-18 14:17:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 2.5614406779661016) internal successors, (8463), 3304 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 8463 transitions. [2022-01-18 14:17:50,184 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 8463 transitions. Word has length 35 [2022-01-18 14:17:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:50,184 INFO L470 AbstractCegarLoop]: Abstraction has 3305 states and 8463 transitions. [2022-01-18 14:17:50,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 8463 transitions. [2022-01-18 14:17:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:50,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:50,187 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:50,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 14:17:50,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:50,387 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash 732247778, now seen corresponding path program 22 times [2022-01-18 14:17:50,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038575733] [2022-01-18 14:17:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:50,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:50,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038575733] [2022-01-18 14:17:50,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038575733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038185540] [2022-01-18 14:17:50,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:50,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:50,476 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:50,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 14:17:50,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:50,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:50,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038185540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:50,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:50,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-01-18 14:17:50,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107401200] [2022-01-18 14:17:50,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:50,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:17:50,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:17:50,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:17:50,803 INFO L87 Difference]: Start difference. First operand 3305 states and 8463 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:51,093 INFO L93 Difference]: Finished difference Result 4460 states and 10988 transitions. [2022-01-18 14:17:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:17:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:51,100 INFO L225 Difference]: With dead ends: 4460 [2022-01-18 14:17:51,100 INFO L226 Difference]: Without dead ends: 4460 [2022-01-18 14:17:51,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:17:51,100 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:51,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 146 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-01-18 14:17:51,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3173. [2022-01-18 14:17:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 2.5453972257250945) internal successors, (8074), 3172 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 8074 transitions. [2022-01-18 14:17:51,145 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 8074 transitions. Word has length 35 [2022-01-18 14:17:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 8074 transitions. [2022-01-18 14:17:51,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 8074 transitions. [2022-01-18 14:17:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:51,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:51,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:51,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 14:17:51,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:51,349 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2009131819, now seen corresponding path program 16 times [2022-01-18 14:17:51,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:51,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539469143] [2022-01-18 14:17:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:51,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:51,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539469143] [2022-01-18 14:17:51,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539469143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215933476] [2022-01-18 14:17:51,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:51,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:51,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:51,427 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 14:17:51,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:51,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:51,559 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:51,559 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 20 treesize of output 19 [2022-01-18 14:17:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:51,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215933476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:51,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:51,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:17:51,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822765204] [2022-01-18 14:17:51,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:51,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:51,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:51,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:51,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:51,601 INFO L87 Difference]: Start difference. First operand 3173 states and 8074 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:51,800 INFO L93 Difference]: Finished difference Result 3824 states and 9404 transitions. [2022-01-18 14:17:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:17:51,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:51,804 INFO L225 Difference]: With dead ends: 3824 [2022-01-18 14:17:51,804 INFO L226 Difference]: Without dead ends: 3806 [2022-01-18 14:17:51,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:17:51,804 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:51,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 134 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2022-01-18 14:17:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3089. [2022-01-18 14:17:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3088 states have (on average 2.5333549222797926) internal successors, (7823), 3088 states have internal predecessors, (7823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 7823 transitions. [2022-01-18 14:17:51,850 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 7823 transitions. Word has length 35 [2022-01-18 14:17:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:51,850 INFO L470 AbstractCegarLoop]: Abstraction has 3089 states and 7823 transitions. [2022-01-18 14:17:51,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 7823 transitions. [2022-01-18 14:17:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:51,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:51,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:51,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:52,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:52,075 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2108944533, now seen corresponding path program 23 times [2022-01-18 14:17:52,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:52,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350074003] [2022-01-18 14:17:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:52,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:52,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350074003] [2022-01-18 14:17:52,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350074003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236466966] [2022-01-18 14:17:52,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:52,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:52,158 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:52,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 14:17:52,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:17:52,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:52,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:52,397 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:52,397 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 20 treesize of output 19 [2022-01-18 14:17:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:52,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236466966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:52,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:52,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:17:52,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190461959] [2022-01-18 14:17:52,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:52,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:17:52,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:17:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:17:52,441 INFO L87 Difference]: Start difference. First operand 3089 states and 7823 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:52,659 INFO L93 Difference]: Finished difference Result 3205 states and 8027 transitions. [2022-01-18 14:17:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:52,663 INFO L225 Difference]: With dead ends: 3205 [2022-01-18 14:17:52,663 INFO L226 Difference]: Without dead ends: 3165 [2022-01-18 14:17:52,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:17:52,663 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:52,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 166 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2022-01-18 14:17:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 3065. [2022-01-18 14:17:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5277415143603132) internal successors, (7745), 3064 states have internal predecessors, (7745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7745 transitions. [2022-01-18 14:17:52,694 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7745 transitions. Word has length 35 [2022-01-18 14:17:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:52,694 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 7745 transitions. [2022-01-18 14:17:52,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7745 transitions. [2022-01-18 14:17:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:52,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:52,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:52,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 14:17:52,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-18 14:17:52,897 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:52,897 INFO L85 PathProgramCache]: Analyzing trace with hash -672333215, now seen corresponding path program 24 times [2022-01-18 14:17:52,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:52,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426964750] [2022-01-18 14:17:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:52,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:52,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426964750] [2022-01-18 14:17:52,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426964750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959171720] [2022-01-18 14:17:52,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:52,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:52,982 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:52,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 14:17:53,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:17:53,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:53,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:53,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:53,129 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:53,129 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 15 [2022-01-18 14:17:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:17:53,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959171720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:53,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:53,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:17:53,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503432473] [2022-01-18 14:17:53,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:53,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:53,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:53,208 INFO L87 Difference]: Start difference. First operand 3065 states and 7745 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:53,327 INFO L93 Difference]: Finished difference Result 3420 states and 8465 transitions. [2022-01-18 14:17:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:53,331 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 14:17:53,331 INFO L226 Difference]: Without dead ends: 3408 [2022-01-18 14:17:53,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:53,332 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:53,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-01-18 14:17:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3025. [2022-01-18 14:17:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 2.5221560846560847) internal successors, (7627), 3024 states have internal predecessors, (7627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 7627 transitions. [2022-01-18 14:17:53,372 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 7627 transitions. Word has length 35 [2022-01-18 14:17:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:53,372 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 7627 transitions. [2022-01-18 14:17:53,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 7627 transitions. [2022-01-18 14:17:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:53,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:53,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:53,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 14:17:53,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 14:17:53,575 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1641585207, now seen corresponding path program 25 times [2022-01-18 14:17:53,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463425456] [2022-01-18 14:17:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:53,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:53,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463425456] [2022-01-18 14:17:53,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463425456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619483339] [2022-01-18 14:17:53,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:53,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:53,676 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:53,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 14:17:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:53,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:53,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:53,909 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:53,909 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 20 treesize of output 19 [2022-01-18 14:17:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619483339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:53,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:53,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 14:17:53,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922598133] [2022-01-18 14:17:53,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:53,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:17:53,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:17:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:17:53,973 INFO L87 Difference]: Start difference. First operand 3025 states and 7627 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:54,179 INFO L93 Difference]: Finished difference Result 3140 states and 7833 transitions. [2022-01-18 14:17:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:54,183 INFO L225 Difference]: With dead ends: 3140 [2022-01-18 14:17:54,183 INFO L226 Difference]: Without dead ends: 3117 [2022-01-18 14:17:54,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:17:54,184 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:54,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 135 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2022-01-18 14:17:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3009. [2022-01-18 14:17:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.5189494680851063) internal successors, (7577), 3008 states have internal predecessors, (7577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 7577 transitions. [2022-01-18 14:17:54,215 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 7577 transitions. Word has length 35 [2022-01-18 14:17:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:54,216 INFO L470 AbstractCegarLoop]: Abstraction has 3009 states and 7577 transitions. [2022-01-18 14:17:54,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 7577 transitions. [2022-01-18 14:17:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:54,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:54,218 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:54,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 14:17:54,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 14:17:54,418 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1220962274, now seen corresponding path program 26 times [2022-01-18 14:17:54,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:54,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108755869] [2022-01-18 14:17:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:54,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:54,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108755869] [2022-01-18 14:17:54,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108755869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739903321] [2022-01-18 14:17:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:17:54,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:54,482 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:54,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 14:17:54,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:17:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 14:17:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:54,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:54,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739903321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:54,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:54,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-01-18 14:17:54,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871946238] [2022-01-18 14:17:54,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:54,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:17:54,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:17:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:54,800 INFO L87 Difference]: Start difference. First operand 3009 states and 7577 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:55,012 INFO L93 Difference]: Finished difference Result 4143 states and 10150 transitions. [2022-01-18 14:17:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:17:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:55,018 INFO L225 Difference]: With dead ends: 4143 [2022-01-18 14:17:55,018 INFO L226 Difference]: Without dead ends: 4143 [2022-01-18 14:17:55,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:17:55,018 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:55,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 97 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:17:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-01-18 14:17:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3285. [2022-01-18 14:17:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 3284 states have (on average 2.5569427527405604) internal successors, (8397), 3284 states have internal predecessors, (8397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 8397 transitions. [2022-01-18 14:17:55,060 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 8397 transitions. Word has length 35 [2022-01-18 14:17:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:55,060 INFO L470 AbstractCegarLoop]: Abstraction has 3285 states and 8397 transitions. [2022-01-18 14:17:55,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 8397 transitions. [2022-01-18 14:17:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:55,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:55,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:55,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 14:17:55,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 14:17:55,263 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash 982900757, now seen corresponding path program 17 times [2022-01-18 14:17:55,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:55,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764175312] [2022-01-18 14:17:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:55,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:55,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764175312] [2022-01-18 14:17:55,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764175312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794263116] [2022-01-18 14:17:55,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:55,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:55,353 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:55,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 14:17:55,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:17:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:55,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:55,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:55,471 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:55,471 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 15 [2022-01-18 14:17:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:55,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794263116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:55,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:55,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:17:55,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365298836] [2022-01-18 14:17:55,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:55,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:55,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:55,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:55,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:55,533 INFO L87 Difference]: Start difference. First operand 3285 states and 8397 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:55,717 INFO L93 Difference]: Finished difference Result 3741 states and 9357 transitions. [2022-01-18 14:17:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:55,722 INFO L225 Difference]: With dead ends: 3741 [2022-01-18 14:17:55,722 INFO L226 Difference]: Without dead ends: 3732 [2022-01-18 14:17:55,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:55,722 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:55,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 169 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2022-01-18 14:17:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3312. [2022-01-18 14:17:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 2.5572334642102086) internal successors, (8467), 3311 states have internal predecessors, (8467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 8467 transitions. [2022-01-18 14:17:55,756 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 8467 transitions. Word has length 35 [2022-01-18 14:17:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:55,756 INFO L470 AbstractCegarLoop]: Abstraction has 3312 states and 8467 transitions. [2022-01-18 14:17:55,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 8467 transitions. [2022-01-18 14:17:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:55,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:55,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:55,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 14:17:55,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:55,959 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1811733547, now seen corresponding path program 27 times [2022-01-18 14:17:55,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:55,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911034749] [2022-01-18 14:17:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:55,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:56,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:56,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911034749] [2022-01-18 14:17:56,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911034749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:56,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777653795] [2022-01-18 14:17:56,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:17:56,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:56,034 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:56,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 14:17:56,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:17:56,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:56,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:56,171 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:56,172 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 15 [2022-01-18 14:17:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:56,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777653795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:56,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:56,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-18 14:17:56,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291143937] [2022-01-18 14:17:56,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:56,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:56,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:56,238 INFO L87 Difference]: Start difference. First operand 3312 states and 8467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:56,440 INFO L93 Difference]: Finished difference Result 3617 states and 9043 transitions. [2022-01-18 14:17:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:56,445 INFO L225 Difference]: With dead ends: 3617 [2022-01-18 14:17:56,445 INFO L226 Difference]: Without dead ends: 3536 [2022-01-18 14:17:56,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:56,445 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:56,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 156 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-01-18 14:17:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 3211. [2022-01-18 14:17:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 3210 states have (on average 2.5707165109034267) internal successors, (8252), 3210 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 8252 transitions. [2022-01-18 14:17:56,482 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 8252 transitions. Word has length 35 [2022-01-18 14:17:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:56,482 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 8252 transitions. [2022-01-18 14:17:56,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 8252 transitions. [2022-01-18 14:17:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:56,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:56,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:56,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:56,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,707 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1869697569, now seen corresponding path program 28 times [2022-01-18 14:17:56,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:56,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104617497] [2022-01-18 14:17:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:56,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:56,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:56,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104617497] [2022-01-18 14:17:56,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104617497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:56,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356120683] [2022-01-18 14:17:56,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:17:56,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:56,786 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:56,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 14:17:56,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:17:56,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:56,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:56,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:56,907 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:17:56,908 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 15 [2022-01-18 14:17:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:17:56,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356120683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:56,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:56,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 14:17:56,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83001583] [2022-01-18 14:17:56,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:56,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:17:56,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:56,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:17:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:17:56,993 INFO L87 Difference]: Start difference. First operand 3211 states and 8252 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:57,186 INFO L93 Difference]: Finished difference Result 3558 states and 8978 transitions. [2022-01-18 14:17:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:17:57,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:57,192 INFO L225 Difference]: With dead ends: 3558 [2022-01-18 14:17:57,192 INFO L226 Difference]: Without dead ends: 3546 [2022-01-18 14:17:57,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:17:57,192 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:57,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 143 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2022-01-18 14:17:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3213. [2022-01-18 14:17:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.5703611457036115) internal successors, (8256), 3212 states have internal predecessors, (8256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8256 transitions. [2022-01-18 14:17:57,236 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8256 transitions. Word has length 35 [2022-01-18 14:17:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:57,236 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 8256 transitions. [2022-01-18 14:17:57,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8256 transitions. [2022-01-18 14:17:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:57,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:57,239 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:57,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 14:17:57,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:57,459 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -283352393, now seen corresponding path program 29 times [2022-01-18 14:17:57,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391110216] [2022-01-18 14:17:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:57,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:57,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391110216] [2022-01-18 14:17:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391110216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684228496] [2022-01-18 14:17:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:17:57,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:57,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:57,532 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:57,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 14:17:57,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:17:57,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:57,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:57,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:57,669 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:57,669 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 20 treesize of output 19 [2022-01-18 14:17:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:57,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684228496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:57,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:57,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:17:57,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717970961] [2022-01-18 14:17:57,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:57,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:17:57,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:17:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:17:57,728 INFO L87 Difference]: Start difference. First operand 3213 states and 8256 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:57,983 INFO L93 Difference]: Finished difference Result 4231 states and 10491 transitions. [2022-01-18 14:17:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:17:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:57,988 INFO L225 Difference]: With dead ends: 4231 [2022-01-18 14:17:57,988 INFO L226 Difference]: Without dead ends: 4177 [2022-01-18 14:17:57,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:17:57,989 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 194 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:57,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 185 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2022-01-18 14:17:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 3248. [2022-01-18 14:17:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 2.574684323991377) internal successors, (8360), 3247 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 8360 transitions. [2022-01-18 14:17:58,028 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 8360 transitions. Word has length 35 [2022-01-18 14:17:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:58,028 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 8360 transitions. [2022-01-18 14:17:58,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 8360 transitions. [2022-01-18 14:17:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:58,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:58,031 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:58,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 14:17:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:58,247 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash -128515859, now seen corresponding path program 30 times [2022-01-18 14:17:58,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:58,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895173124] [2022-01-18 14:17:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:58,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:58,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:58,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895173124] [2022-01-18 14:17:58,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895173124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:58,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552256427] [2022-01-18 14:17:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:17:58,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:58,316 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:58,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 14:17:58,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 14:17:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:17:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:17:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:58,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:58,455 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:58,456 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 20 treesize of output 19 [2022-01-18 14:17:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:17:58,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552256427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:58,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:58,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:17:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943016169] [2022-01-18 14:17:58,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:58,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:17:58,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:17:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:17:58,506 INFO L87 Difference]: Start difference. First operand 3248 states and 8360 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:17:58,888 INFO L93 Difference]: Finished difference Result 5007 states and 12333 transitions. [2022-01-18 14:17:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:17:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:17:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:17:58,894 INFO L225 Difference]: With dead ends: 5007 [2022-01-18 14:17:58,894 INFO L226 Difference]: Without dead ends: 4893 [2022-01-18 14:17:58,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:17:58,894 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 371 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:17:58,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 188 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:17:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2022-01-18 14:17:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3400. [2022-01-18 14:17:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3399 states have (on average 2.5763459841129746) internal successors, (8757), 3399 states have internal predecessors, (8757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 8757 transitions. [2022-01-18 14:17:58,953 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 8757 transitions. Word has length 35 [2022-01-18 14:17:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:17:58,953 INFO L470 AbstractCegarLoop]: Abstraction has 3400 states and 8757 transitions. [2022-01-18 14:17:58,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:17:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 8757 transitions. [2022-01-18 14:17:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 14:17:58,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:17:58,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:17:58,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 14:17:59,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,157 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:17:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:17:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -188207369, now seen corresponding path program 31 times [2022-01-18 14:17:59,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:17:59,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742635964] [2022-01-18 14:17:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:17:59,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:17:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:17:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742635964] [2022-01-18 14:17:59,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742635964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:17:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398659021] [2022-01-18 14:17:59,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:17:59,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:17:59,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:17:59,228 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:17:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 14:17:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:17:59,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:17:59,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:17:59,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:59,383 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 20 treesize of output 14 [2022-01-18 14:17:59,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:17:59,385 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 10 treesize of output 1 [2022-01-18 14:17:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:17:59,505 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:17:59,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:17:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:17:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398659021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:17:59,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:17:59,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2022-01-18 14:17:59,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348255793] [2022-01-18 14:17:59,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:17:59,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:17:59,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:17:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:17:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:17:59,604 INFO L87 Difference]: Start difference. First operand 3400 states and 8757 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:00,886 INFO L93 Difference]: Finished difference Result 8077 states and 19270 transitions. [2022-01-18 14:18:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 14:18:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 14:18:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:00,896 INFO L225 Difference]: With dead ends: 8077 [2022-01-18 14:18:00,896 INFO L226 Difference]: Without dead ends: 7838 [2022-01-18 14:18:00,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=3644, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 14:18:00,896 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 724 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:00,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 830 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:18:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2022-01-18 14:18:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 4698. [2022-01-18 14:18:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 2.585480093676815) internal successors, (12144), 4697 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 12144 transitions. [2022-01-18 14:18:00,961 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 12144 transitions. Word has length 35 [2022-01-18 14:18:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:00,962 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 12144 transitions. [2022-01-18 14:18:00,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 12144 transitions. [2022-01-18 14:18:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:18:00,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:00,965 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:00,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 14:18:01,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 14:18:01,166 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 237519579, now seen corresponding path program 32 times [2022-01-18 14:18:01,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552576810] [2022-01-18 14:18:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:01,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:01,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552576810] [2022-01-18 14:18:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552576810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289084816] [2022-01-18 14:18:01,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:01,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:01,227 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:01,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 14:18:01,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:18:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:01,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:01,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289084816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:01,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:01,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 16 [2022-01-18 14:18:01,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490867892] [2022-01-18 14:18:01,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:01,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:18:01,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:18:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:01,672 INFO L87 Difference]: Start difference. First operand 4698 states and 12144 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:02,369 INFO L93 Difference]: Finished difference Result 5956 states and 14888 transitions. [2022-01-18 14:18:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 14:18:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:18:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:02,380 INFO L225 Difference]: With dead ends: 5956 [2022-01-18 14:18:02,380 INFO L226 Difference]: Without dead ends: 5906 [2022-01-18 14:18:02,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 14:18:02,380 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 382 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:02,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 367 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:18:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2022-01-18 14:18:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5198. [2022-01-18 14:18:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5198 states, 5197 states have (on average 2.5684048489513183) internal successors, (13348), 5197 states have internal predecessors, (13348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 13348 transitions. [2022-01-18 14:18:02,486 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 13348 transitions. Word has length 38 [2022-01-18 14:18:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:02,486 INFO L470 AbstractCegarLoop]: Abstraction has 5198 states and 13348 transitions. [2022-01-18 14:18:02,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 13348 transitions. [2022-01-18 14:18:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:18:02,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:02,490 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:02,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 14:18:02,690 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 72205555, now seen corresponding path program 33 times [2022-01-18 14:18:02,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070746250] [2022-01-18 14:18:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:02,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:02,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:02,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070746250] [2022-01-18 14:18:02,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070746250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:02,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146618346] [2022-01-18 14:18:02,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:02,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:02,757 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:02,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 14:18:02,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:18:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:18:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:02,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:02,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146618346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:02,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:02,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-18 14:18:02,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144267885] [2022-01-18 14:18:02,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:02,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:18:02,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:18:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:02,973 INFO L87 Difference]: Start difference. First operand 5198 states and 13348 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:03,119 INFO L93 Difference]: Finished difference Result 5899 states and 14827 transitions. [2022-01-18 14:18:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:18:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:18:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:03,126 INFO L225 Difference]: With dead ends: 5899 [2022-01-18 14:18:03,126 INFO L226 Difference]: Without dead ends: 5847 [2022-01-18 14:18:03,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 12 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:18:03,126 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:03,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2022-01-18 14:18:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5208. [2022-01-18 14:18:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5208 states, 5207 states have (on average 2.563088150566545) internal successors, (13346), 5207 states have internal predecessors, (13346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5208 states to 5208 states and 13346 transitions. [2022-01-18 14:18:03,191 INFO L78 Accepts]: Start accepts. Automaton has 5208 states and 13346 transitions. Word has length 38 [2022-01-18 14:18:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:03,191 INFO L470 AbstractCegarLoop]: Abstraction has 5208 states and 13346 transitions. [2022-01-18 14:18:03,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5208 states and 13346 transitions. [2022-01-18 14:18:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:18:03,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:03,195 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:03,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 14:18:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:03,395 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash 784212400, now seen corresponding path program 18 times [2022-01-18 14:18:03,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432307642] [2022-01-18 14:18:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:03,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:18:03,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432307642] [2022-01-18 14:18:03,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432307642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133856505] [2022-01-18 14:18:03,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:03,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:03,455 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:03,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 14:18:03,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:18:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:18:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:03,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133856505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:03,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:03,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-01-18 14:18:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508625323] [2022-01-18 14:18:03,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:18:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:18:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:18:03,800 INFO L87 Difference]: Start difference. First operand 5208 states and 13346 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:04,124 INFO L93 Difference]: Finished difference Result 7225 states and 17694 transitions. [2022-01-18 14:18:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:18:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:18:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:04,133 INFO L225 Difference]: With dead ends: 7225 [2022-01-18 14:18:04,133 INFO L226 Difference]: Without dead ends: 7173 [2022-01-18 14:18:04,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:04,134 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 288 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:04,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 256 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2022-01-18 14:18:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4849. [2022-01-18 14:18:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 2.540016501650165) internal successors, (12314), 4848 states have internal predecessors, (12314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 12314 transitions. [2022-01-18 14:18:04,218 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 12314 transitions. Word has length 38 [2022-01-18 14:18:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:04,218 INFO L470 AbstractCegarLoop]: Abstraction has 4849 states and 12314 transitions. [2022-01-18 14:18:04,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 12314 transitions. [2022-01-18 14:18:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 14:18:04,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:04,222 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:04,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 14:18:04,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:04,422 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 121942062, now seen corresponding path program 19 times [2022-01-18 14:18:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905045190] [2022-01-18 14:18:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:04,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:18:04,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:04,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905045190] [2022-01-18 14:18:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905045190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:04,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004971326] [2022-01-18 14:18:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:04,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:04,478 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:04,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 14:18:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:18:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:04,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004971326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:04,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:04,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 16 [2022-01-18 14:18:04,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628479766] [2022-01-18 14:18:04,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:04,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:18:04,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:18:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:04,830 INFO L87 Difference]: Start difference. First operand 4849 states and 12314 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:05,293 INFO L93 Difference]: Finished difference Result 6805 states and 16547 transitions. [2022-01-18 14:18:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:18:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 14:18:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:05,301 INFO L225 Difference]: With dead ends: 6805 [2022-01-18 14:18:05,302 INFO L226 Difference]: Without dead ends: 6716 [2022-01-18 14:18:05,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:18:05,302 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 328 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 340 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6716 states. [2022-01-18 14:18:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6716 to 4804. [2022-01-18 14:18:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 2.5363314595044764) internal successors, (12182), 4803 states have internal predecessors, (12182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 12182 transitions. [2022-01-18 14:18:05,362 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 12182 transitions. Word has length 38 [2022-01-18 14:18:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:05,362 INFO L470 AbstractCegarLoop]: Abstraction has 4804 states and 12182 transitions. [2022-01-18 14:18:05,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 12182 transitions. [2022-01-18 14:18:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:05,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:05,366 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:05,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 14:18:05,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:05,566 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1532856280, now seen corresponding path program 20 times [2022-01-18 14:18:05,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:05,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012643016] [2022-01-18 14:18:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:05,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:05,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012643016] [2022-01-18 14:18:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012643016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853710604] [2022-01-18 14:18:05,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:05,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:05,676 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:05,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 14:18:05,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:18:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:06,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:06,610 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:06,610 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 15 [2022-01-18 14:18:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:06,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853710604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:06,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:06,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 32 [2022-01-18 14:18:06,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119213966] [2022-01-18 14:18:06,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:06,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 14:18:06,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 14:18:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:18:06,680 INFO L87 Difference]: Start difference. First operand 4804 states and 12182 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:11,710 INFO L93 Difference]: Finished difference Result 13871 states and 32021 transitions. [2022-01-18 14:18:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 14:18:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:11,726 INFO L225 Difference]: With dead ends: 13871 [2022-01-18 14:18:11,726 INFO L226 Difference]: Without dead ends: 13424 [2022-01-18 14:18:11,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 131 SyntacticMatches, 19 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13336 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3748, Invalid=28832, Unknown=0, NotChecked=0, Total=32580 [2022-01-18 14:18:11,729 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1086 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 5473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3913 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:11,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 2047 Invalid, 5473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1486 Invalid, 0 Unknown, 3913 Unchecked, 0.6s Time] [2022-01-18 14:18:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13424 states. [2022-01-18 14:18:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13424 to 7078. [2022-01-18 14:18:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 2.5611134661579764) internal successors, (18125), 7077 states have internal predecessors, (18125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 18125 transitions. [2022-01-18 14:18:11,847 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 18125 transitions. Word has length 41 [2022-01-18 14:18:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:11,847 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 18125 transitions. [2022-01-18 14:18:11,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 18125 transitions. [2022-01-18 14:18:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:11,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:11,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:11,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 14:18:12,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 14:18:12,054 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1309554728, now seen corresponding path program 34 times [2022-01-18 14:18:12,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:12,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26288794] [2022-01-18 14:18:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:12,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:12,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:12,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26288794] [2022-01-18 14:18:12,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26288794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224090603] [2022-01-18 14:18:12,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:12,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:12,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:12,166 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:12,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 14:18:12,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:12,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:12,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:12,503 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:12,503 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 20 treesize of output 19 [2022-01-18 14:18:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:12,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224090603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:12,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:12,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-18 14:18:12,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165941458] [2022-01-18 14:18:12,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:12,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:18:12,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:18:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:18:12,553 INFO L87 Difference]: Start difference. First operand 7078 states and 18125 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:13,255 INFO L93 Difference]: Finished difference Result 7674 states and 19268 transitions. [2022-01-18 14:18:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:18:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:13,266 INFO L225 Difference]: With dead ends: 7674 [2022-01-18 14:18:13,266 INFO L226 Difference]: Without dead ends: 7536 [2022-01-18 14:18:13,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:18:13,266 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 185 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:13,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 551 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1588 Invalid, 0 Unknown, 109 Unchecked, 0.5s Time] [2022-01-18 14:18:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2022-01-18 14:18:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 7046. [2022-01-18 14:18:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 2.555429382540809) internal successors, (18003), 7045 states have internal predecessors, (18003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 18003 transitions. [2022-01-18 14:18:13,364 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 18003 transitions. Word has length 41 [2022-01-18 14:18:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:13,364 INFO L470 AbstractCegarLoop]: Abstraction has 7046 states and 18003 transitions. [2022-01-18 14:18:13,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 18003 transitions. [2022-01-18 14:18:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:13,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:13,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:13,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:13,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 14:18:13,571 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:13,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1943773144, now seen corresponding path program 21 times [2022-01-18 14:18:13,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:13,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748665620] [2022-01-18 14:18:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:13,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:13,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:13,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748665620] [2022-01-18 14:18:13,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748665620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:13,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037555055] [2022-01-18 14:18:13,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:13,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:13,673 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:13,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 14:18:13,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 14:18:13,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:13,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:13,865 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:13,865 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 20 treesize of output 19 [2022-01-18 14:18:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037555055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:13,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:13,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:18:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207482721] [2022-01-18 14:18:13,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:18:13,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:18:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:13,934 INFO L87 Difference]: Start difference. First operand 7046 states and 18003 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:15,198 INFO L93 Difference]: Finished difference Result 15023 states and 35388 transitions. [2022-01-18 14:18:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:18:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:15,220 INFO L225 Difference]: With dead ends: 15023 [2022-01-18 14:18:15,220 INFO L226 Difference]: Without dead ends: 14664 [2022-01-18 14:18:15,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 14:18:15,220 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 308 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:15,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 877 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:18:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14664 states. [2022-01-18 14:18:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14664 to 7664. [2022-01-18 14:18:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7664 states, 7663 states have (on average 2.55056766279525) internal successors, (19545), 7663 states have internal predecessors, (19545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7664 states to 7664 states and 19545 transitions. [2022-01-18 14:18:15,368 INFO L78 Accepts]: Start accepts. Automaton has 7664 states and 19545 transitions. Word has length 41 [2022-01-18 14:18:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:15,368 INFO L470 AbstractCegarLoop]: Abstraction has 7664 states and 19545 transitions. [2022-01-18 14:18:15,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7664 states and 19545 transitions. [2022-01-18 14:18:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:15,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:15,376 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:15,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 14:18:15,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 14:18:15,576 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2128352424, now seen corresponding path program 35 times [2022-01-18 14:18:15,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:15,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47060334] [2022-01-18 14:18:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:15,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:15,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:15,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47060334] [2022-01-18 14:18:15,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47060334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:15,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121806757] [2022-01-18 14:18:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:15,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:15,676 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:15,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 14:18:15,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:18:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:15,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:15,959 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:15,959 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 20 treesize of output 19 [2022-01-18 14:18:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:16,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121806757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:16,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:16,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 14:18:16,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893819204] [2022-01-18 14:18:16,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:16,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:18:16,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:18:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:16,047 INFO L87 Difference]: Start difference. First operand 7664 states and 19545 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:16,337 INFO L93 Difference]: Finished difference Result 9035 states and 22550 transitions. [2022-01-18 14:18:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:18:16,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:16,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:16,350 INFO L225 Difference]: With dead ends: 9035 [2022-01-18 14:18:16,350 INFO L226 Difference]: Without dead ends: 9012 [2022-01-18 14:18:16,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:16,350 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:16,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 269 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 599 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-01-18 14:18:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-01-18 14:18:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 8314. [2022-01-18 14:18:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8314 states, 8313 states have (on average 2.537591723806087) internal successors, (21095), 8313 states have internal predecessors, (21095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8314 states to 8314 states and 21095 transitions. [2022-01-18 14:18:16,482 INFO L78 Accepts]: Start accepts. Automaton has 8314 states and 21095 transitions. Word has length 41 [2022-01-18 14:18:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 8314 states and 21095 transitions. [2022-01-18 14:18:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 8314 states and 21095 transitions. [2022-01-18 14:18:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:16,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:16,490 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:16,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 14:18:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 14:18:16,702 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1811602724, now seen corresponding path program 36 times [2022-01-18 14:18:16,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506567752] [2022-01-18 14:18:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:16,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:16,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506567752] [2022-01-18 14:18:16,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506567752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521106066] [2022-01-18 14:18:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:16,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:16,782 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 14:18:16,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 14:18:16,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:16,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:17,126 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:18:17,126 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 16 [2022-01-18 14:18:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:17,615 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:17,615 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 15 [2022-01-18 14:18:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:18,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521106066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:18,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:18,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 15] total 28 [2022-01-18 14:18:18,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094837288] [2022-01-18 14:18:18,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:18,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:18:18,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:18:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:18:18,055 INFO L87 Difference]: Start difference. First operand 8314 states and 21095 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:19,872 INFO L93 Difference]: Finished difference Result 11904 states and 29601 transitions. [2022-01-18 14:18:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 14:18:19,873 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:19,891 INFO L225 Difference]: With dead ends: 11904 [2022-01-18 14:18:19,891 INFO L226 Difference]: Without dead ends: 11829 [2022-01-18 14:18:19,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=864, Invalid=3558, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 14:18:19,892 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 474 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:19,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 734 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2222 Invalid, 0 Unknown, 212 Unchecked, 0.8s Time] [2022-01-18 14:18:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11829 states. [2022-01-18 14:18:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11829 to 7376. [2022-01-18 14:18:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 2.5563389830508476) internal successors, (18853), 7375 states have internal predecessors, (18853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 18853 transitions. [2022-01-18 14:18:20,028 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 18853 transitions. Word has length 41 [2022-01-18 14:18:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:20,028 INFO L470 AbstractCegarLoop]: Abstraction has 7376 states and 18853 transitions. [2022-01-18 14:18:20,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 18853 transitions. [2022-01-18 14:18:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:20,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:20,035 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:20,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 14:18:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:20,236 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1255677656, now seen corresponding path program 37 times [2022-01-18 14:18:20,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082634057] [2022-01-18 14:18:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:20,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:20,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082634057] [2022-01-18 14:18:20,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082634057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510480614] [2022-01-18 14:18:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:20,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:20,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:20,313 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:20,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 14:18:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:20,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:20,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:20,462 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:20,462 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 15 [2022-01-18 14:18:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:20,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510480614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:20,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:20,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:20,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398117937] [2022-01-18 14:18:20,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:20,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:20,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:20,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:20,546 INFO L87 Difference]: Start difference. First operand 7376 states and 18853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:20,810 INFO L93 Difference]: Finished difference Result 8127 states and 20374 transitions. [2022-01-18 14:18:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:20,822 INFO L225 Difference]: With dead ends: 8127 [2022-01-18 14:18:20,823 INFO L226 Difference]: Without dead ends: 8127 [2022-01-18 14:18:20,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:20,823 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 77 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:20,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 206 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2022-01-18 14:18:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 7388. [2022-01-18 14:18:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7388 states, 7387 states have (on average 2.5571950724245296) internal successors, (18890), 7387 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7388 states to 7388 states and 18890 transitions. [2022-01-18 14:18:20,927 INFO L78 Accepts]: Start accepts. Automaton has 7388 states and 18890 transitions. Word has length 41 [2022-01-18 14:18:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:20,927 INFO L470 AbstractCegarLoop]: Abstraction has 7388 states and 18890 transitions. [2022-01-18 14:18:20,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7388 states and 18890 transitions. [2022-01-18 14:18:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:20,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:20,936 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:20,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 14:18:21,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 14:18:21,158 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1902091, now seen corresponding path program 22 times [2022-01-18 14:18:21,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:21,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048615779] [2022-01-18 14:18:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:21,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048615779] [2022-01-18 14:18:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048615779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681881262] [2022-01-18 14:18:21,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:21,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:21,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:21,267 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:21,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 14:18:21,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:21,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:21,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681881262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:21,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:21,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 16 [2022-01-18 14:18:21,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059686522] [2022-01-18 14:18:21,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:21,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:18:21,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:18:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:21,667 INFO L87 Difference]: Start difference. First operand 7388 states and 18890 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:21,917 INFO L93 Difference]: Finished difference Result 9906 states and 24188 transitions. [2022-01-18 14:18:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:18:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:21,932 INFO L225 Difference]: With dead ends: 9906 [2022-01-18 14:18:21,932 INFO L226 Difference]: Without dead ends: 9804 [2022-01-18 14:18:21,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:18:21,932 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 258 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:21,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 168 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9804 states. [2022-01-18 14:18:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9804 to 7737. [2022-01-18 14:18:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7737 states, 7736 states have (on average 2.5716132368148914) internal successors, (19894), 7736 states have internal predecessors, (19894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7737 states to 7737 states and 19894 transitions. [2022-01-18 14:18:22,093 INFO L78 Accepts]: Start accepts. Automaton has 7737 states and 19894 transitions. Word has length 41 [2022-01-18 14:18:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:22,093 INFO L470 AbstractCegarLoop]: Abstraction has 7737 states and 19894 transitions. [2022-01-18 14:18:22,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 7737 states and 19894 transitions. [2022-01-18 14:18:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:22,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:22,101 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:22,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 14:18:22,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:22,302 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash -173209317, now seen corresponding path program 23 times [2022-01-18 14:18:22,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:22,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861160573] [2022-01-18 14:18:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:22,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:22,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:22,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861160573] [2022-01-18 14:18:22,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861160573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:22,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286876172] [2022-01-18 14:18:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:22,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:22,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:22,392 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:22,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 14:18:22,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:18:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:22,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:22,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286876172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:22,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 17 [2022-01-18 14:18:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197988363] [2022-01-18 14:18:22,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:22,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:18:22,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:18:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:22,727 INFO L87 Difference]: Start difference. First operand 7737 states and 19894 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:23,080 INFO L93 Difference]: Finished difference Result 9662 states and 23990 transitions. [2022-01-18 14:18:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:18:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:23,094 INFO L225 Difference]: With dead ends: 9662 [2022-01-18 14:18:23,094 INFO L226 Difference]: Without dead ends: 9662 [2022-01-18 14:18:23,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=543, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:18:23,094 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 273 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:23,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 175 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9662 states. [2022-01-18 14:18:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9662 to 7850. [2022-01-18 14:18:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7850 states, 7849 states have (on average 2.578672442349344) internal successors, (20240), 7849 states have internal predecessors, (20240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7850 states to 7850 states and 20240 transitions. [2022-01-18 14:18:23,211 INFO L78 Accepts]: Start accepts. Automaton has 7850 states and 20240 transitions. Word has length 41 [2022-01-18 14:18:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:23,211 INFO L470 AbstractCegarLoop]: Abstraction has 7850 states and 20240 transitions. [2022-01-18 14:18:23,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 7850 states and 20240 transitions. [2022-01-18 14:18:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:23,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:23,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:23,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 14:18:23,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:23,420 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1766490874, now seen corresponding path program 24 times [2022-01-18 14:18:23,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:23,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421698011] [2022-01-18 14:18:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:23,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:23,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421698011] [2022-01-18 14:18:23,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421698011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111996772] [2022-01-18 14:18:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:23,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:23,494 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:23,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 14:18:23,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:18:23,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:23,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:23,632 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:23,632 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 15 [2022-01-18 14:18:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:23,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111996772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:23,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:23,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:23,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084044815] [2022-01-18 14:18:23,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:23,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:23,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:23,713 INFO L87 Difference]: Start difference. First operand 7850 states and 20240 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:23,974 INFO L93 Difference]: Finished difference Result 8793 states and 22208 transitions. [2022-01-18 14:18:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:23,985 INFO L225 Difference]: With dead ends: 8793 [2022-01-18 14:18:23,985 INFO L226 Difference]: Without dead ends: 8758 [2022-01-18 14:18:23,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:23,986 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 148 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 222 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8758 states. [2022-01-18 14:18:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8758 to 7925. [2022-01-18 14:18:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7925 states, 7924 states have (on average 2.57761231701161) internal successors, (20425), 7924 states have internal predecessors, (20425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7925 states to 7925 states and 20425 transitions. [2022-01-18 14:18:24,115 INFO L78 Accepts]: Start accepts. Automaton has 7925 states and 20425 transitions. Word has length 41 [2022-01-18 14:18:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:24,115 INFO L470 AbstractCegarLoop]: Abstraction has 7925 states and 20425 transitions. [2022-01-18 14:18:24,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7925 states and 20425 transitions. [2022-01-18 14:18:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:24,123 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:24,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 14:18:24,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:24,324 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -266157882, now seen corresponding path program 38 times [2022-01-18 14:18:24,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:24,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728808041] [2022-01-18 14:18:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:24,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:24,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728808041] [2022-01-18 14:18:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728808041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:24,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447300348] [2022-01-18 14:18:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:24,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:24,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:24,403 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:24,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 14:18:24,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:24,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:24,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:24,592 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:24,593 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 15 [2022-01-18 14:18:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:24,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447300348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:24,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:24,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:18:24,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726649711] [2022-01-18 14:18:24,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:24,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:24,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:24,689 INFO L87 Difference]: Start difference. First operand 7925 states and 20425 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:25,020 INFO L93 Difference]: Finished difference Result 8298 states and 21151 transitions. [2022-01-18 14:18:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:25,031 INFO L225 Difference]: With dead ends: 8298 [2022-01-18 14:18:25,031 INFO L226 Difference]: Without dead ends: 8258 [2022-01-18 14:18:25,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:25,031 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:25,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 258 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8258 states. [2022-01-18 14:18:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8258 to 7919. [2022-01-18 14:18:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7918 states have (on average 2.575524122253094) internal successors, (20393), 7918 states have internal predecessors, (20393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 20393 transitions. [2022-01-18 14:18:25,139 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 20393 transitions. Word has length 41 [2022-01-18 14:18:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:25,140 INFO L470 AbstractCegarLoop]: Abstraction has 7919 states and 20393 transitions. [2022-01-18 14:18:25,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 20393 transitions. [2022-01-18 14:18:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:25,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:25,150 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:25,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 14:18:25,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-18 14:18:25,350 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash -879694062, now seen corresponding path program 39 times [2022-01-18 14:18:25,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:25,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151783143] [2022-01-18 14:18:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:25,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:25,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151783143] [2022-01-18 14:18:25,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151783143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740010496] [2022-01-18 14:18:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:25,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:25,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:25,423 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:25,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 14:18:25,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:18:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:25,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:25,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:25,561 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:25,561 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 15 [2022-01-18 14:18:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:25,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740010496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:25,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:25,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:25,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707422771] [2022-01-18 14:18:25,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:25,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:25,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:25,644 INFO L87 Difference]: Start difference. First operand 7919 states and 20393 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:25,884 INFO L93 Difference]: Finished difference Result 8586 states and 21774 transitions. [2022-01-18 14:18:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:25,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:25,925 INFO L225 Difference]: With dead ends: 8586 [2022-01-18 14:18:25,925 INFO L226 Difference]: Without dead ends: 8559 [2022-01-18 14:18:25,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:25,925 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 100 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:25,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 224 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8559 states. [2022-01-18 14:18:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8559 to 7928. [2022-01-18 14:18:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7928 states, 7927 states have (on average 2.5749968462217736) internal successors, (20412), 7927 states have internal predecessors, (20412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7928 states to 7928 states and 20412 transitions. [2022-01-18 14:18:26,029 INFO L78 Accepts]: Start accepts. Automaton has 7928 states and 20412 transitions. Word has length 41 [2022-01-18 14:18:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:26,029 INFO L470 AbstractCegarLoop]: Abstraction has 7928 states and 20412 transitions. [2022-01-18 14:18:26,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7928 states and 20412 transitions. [2022-01-18 14:18:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:26,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:26,037 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:26,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 14:18:26,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:26,237 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1262223272, now seen corresponding path program 40 times [2022-01-18 14:18:26,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:26,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977339177] [2022-01-18 14:18:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:26,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:26,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:26,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977339177] [2022-01-18 14:18:26,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977339177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:26,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117514638] [2022-01-18 14:18:26,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:26,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:26,312 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:26,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 14:18:26,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:26,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:26,463 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:26,463 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 20 treesize of output 19 [2022-01-18 14:18:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:26,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117514638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:26,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:26,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:18:26,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464269414] [2022-01-18 14:18:26,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:26,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:26,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:26,546 INFO L87 Difference]: Start difference. First operand 7928 states and 20412 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:26,835 INFO L93 Difference]: Finished difference Result 9392 states and 23635 transitions. [2022-01-18 14:18:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:18:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:26,848 INFO L225 Difference]: With dead ends: 9392 [2022-01-18 14:18:26,848 INFO L226 Difference]: Without dead ends: 9359 [2022-01-18 14:18:26,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:26,848 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 127 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:26,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 255 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9359 states. [2022-01-18 14:18:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9359 to 7864. [2022-01-18 14:18:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 7863 states have (on average 2.580948747297469) internal successors, (20294), 7863 states have internal predecessors, (20294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 20294 transitions. [2022-01-18 14:18:26,964 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 20294 transitions. Word has length 41 [2022-01-18 14:18:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:26,964 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 20294 transitions. [2022-01-18 14:18:26,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 20294 transitions. [2022-01-18 14:18:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:26,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:26,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:26,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 14:18:27,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:27,172 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1686786410, now seen corresponding path program 25 times [2022-01-18 14:18:27,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:27,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736885695] [2022-01-18 14:18:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:27,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:27,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736885695] [2022-01-18 14:18:27,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736885695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346554664] [2022-01-18 14:18:27,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:27,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:27,244 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:27,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 14:18:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:27,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:27,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:27,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:27,383 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:27,383 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 15 [2022-01-18 14:18:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:27,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346554664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:27,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:27,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:27,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315423758] [2022-01-18 14:18:27,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:27,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:27,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:27,463 INFO L87 Difference]: Start difference. First operand 7864 states and 20294 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:27,702 INFO L93 Difference]: Finished difference Result 8926 states and 22473 transitions. [2022-01-18 14:18:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:27,714 INFO L225 Difference]: With dead ends: 8926 [2022-01-18 14:18:27,714 INFO L226 Difference]: Without dead ends: 8896 [2022-01-18 14:18:27,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:27,714 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 137 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:27,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 227 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-01-18 14:18:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 7864. [2022-01-18 14:18:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 7863 states have (on average 2.5753529187333077) internal successors, (20250), 7863 states have internal predecessors, (20250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 20250 transitions. [2022-01-18 14:18:27,836 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 20250 transitions. Word has length 41 [2022-01-18 14:18:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:27,837 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 20250 transitions. [2022-01-18 14:18:27,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 20250 transitions. [2022-01-18 14:18:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:27,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:27,844 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:27,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 14:18:28,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 14:18:28,044 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1107847894, now seen corresponding path program 41 times [2022-01-18 14:18:28,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:28,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861952091] [2022-01-18 14:18:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:28,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:28,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:28,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861952091] [2022-01-18 14:18:28,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861952091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:28,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800285361] [2022-01-18 14:18:28,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:28,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:28,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:28,140 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:28,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 14:18:28,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:18:28,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:28,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:28,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:28,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:28,285 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:28,285 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 15 [2022-01-18 14:18:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:28,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800285361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:28,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:28,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:18:28,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948986889] [2022-01-18 14:18:28,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:28,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:28,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:28,363 INFO L87 Difference]: Start difference. First operand 7864 states and 20250 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:28,685 INFO L93 Difference]: Finished difference Result 8284 states and 21051 transitions. [2022-01-18 14:18:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:28,696 INFO L225 Difference]: With dead ends: 8284 [2022-01-18 14:18:28,696 INFO L226 Difference]: Without dead ends: 8220 [2022-01-18 14:18:28,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:28,697 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 86 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 274 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8220 states. [2022-01-18 14:18:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8220 to 7819. [2022-01-18 14:18:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 7818 states have (on average 2.5693271936556665) internal successors, (20087), 7818 states have internal predecessors, (20087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 20087 transitions. [2022-01-18 14:18:28,797 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 20087 transitions. Word has length 41 [2022-01-18 14:18:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 7819 states and 20087 transitions. [2022-01-18 14:18:28,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 20087 transitions. [2022-01-18 14:18:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:28,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:28,804 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:28,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 14:18:29,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 14:18:29,004 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1721384074, now seen corresponding path program 42 times [2022-01-18 14:18:29,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168817100] [2022-01-18 14:18:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:29,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:29,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168817100] [2022-01-18 14:18:29,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168817100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041825739] [2022-01-18 14:18:29,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:29,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:29,086 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:29,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 14:18:29,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:18:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:29,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:29,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:29,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:29,237 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 15 [2022-01-18 14:18:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:29,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041825739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:29,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:29,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:29,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313520469] [2022-01-18 14:18:29,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:29,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:29,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:29,319 INFO L87 Difference]: Start difference. First operand 7819 states and 20087 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:29,586 INFO L93 Difference]: Finished difference Result 8708 states and 21927 transitions. [2022-01-18 14:18:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:29,598 INFO L225 Difference]: With dead ends: 8708 [2022-01-18 14:18:29,598 INFO L226 Difference]: Without dead ends: 8666 [2022-01-18 14:18:29,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:29,599 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 114 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:29,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 274 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2022-01-18 14:18:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7755. [2022-01-18 14:18:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7755 states, 7754 states have (on average 2.567706989940676) internal successors, (19910), 7754 states have internal predecessors, (19910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7755 states to 7755 states and 19910 transitions. [2022-01-18 14:18:29,718 INFO L78 Accepts]: Start accepts. Automaton has 7755 states and 19910 transitions. Word has length 41 [2022-01-18 14:18:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:29,718 INFO L470 AbstractCegarLoop]: Abstraction has 7755 states and 19910 transitions. [2022-01-18 14:18:29,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7755 states and 19910 transitions. [2022-01-18 14:18:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:29,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:29,725 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:29,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 14:18:29,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 14:18:29,926 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 420533260, now seen corresponding path program 43 times [2022-01-18 14:18:29,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:29,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255427198] [2022-01-18 14:18:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:29,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:30,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255427198] [2022-01-18 14:18:30,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255427198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930370926] [2022-01-18 14:18:30,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:30,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:30,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:30,009 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:30,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 14:18:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:30,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:30,163 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:30,163 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 20 treesize of output 19 [2022-01-18 14:18:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:30,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930370926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:30,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:30,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:18:30,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843408176] [2022-01-18 14:18:30,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:30,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:30,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:30,262 INFO L87 Difference]: Start difference. First operand 7755 states and 19910 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:30,588 INFO L93 Difference]: Finished difference Result 9363 states and 23419 transitions. [2022-01-18 14:18:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:18:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:30,600 INFO L225 Difference]: With dead ends: 9363 [2022-01-18 14:18:30,601 INFO L226 Difference]: Without dead ends: 9321 [2022-01-18 14:18:30,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:18:30,601 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 201 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:30,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 305 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2022-01-18 14:18:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 7538. [2022-01-18 14:18:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 2.5832559373756134) internal successors, (19470), 7537 states have internal predecessors, (19470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 19470 transitions. [2022-01-18 14:18:30,710 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 19470 transitions. Word has length 41 [2022-01-18 14:18:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:30,710 INFO L470 AbstractCegarLoop]: Abstraction has 7538 states and 19470 transitions. [2022-01-18 14:18:30,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 19470 transitions. [2022-01-18 14:18:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:30,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:30,717 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:30,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 14:18:30,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:30,917 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash 575369794, now seen corresponding path program 44 times [2022-01-18 14:18:30,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987500541] [2022-01-18 14:18:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:30,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:31,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987500541] [2022-01-18 14:18:31,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987500541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905983392] [2022-01-18 14:18:31,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:31,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:31,012 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:31,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 14:18:31,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:31,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:31,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:31,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:31,169 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:31,169 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 20 treesize of output 19 [2022-01-18 14:18:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905983392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:31,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:31,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:18:31,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066022530] [2022-01-18 14:18:31,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:18:31,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:31,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:18:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:18:31,239 INFO L87 Difference]: Start difference. First operand 7538 states and 19470 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:31,573 INFO L93 Difference]: Finished difference Result 9064 states and 22789 transitions. [2022-01-18 14:18:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:18:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:31,586 INFO L225 Difference]: With dead ends: 9064 [2022-01-18 14:18:31,586 INFO L226 Difference]: Without dead ends: 9010 [2022-01-18 14:18:31,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:18:31,586 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:31,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 292 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2022-01-18 14:18:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 7498. [2022-01-18 14:18:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7498 states, 7497 states have (on average 2.5800987061491263) internal successors, (19343), 7497 states have internal predecessors, (19343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7498 states to 7498 states and 19343 transitions. [2022-01-18 14:18:31,732 INFO L78 Accepts]: Start accepts. Automaton has 7498 states and 19343 transitions. Word has length 41 [2022-01-18 14:18:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:31,733 INFO L470 AbstractCegarLoop]: Abstraction has 7498 states and 19343 transitions. [2022-01-18 14:18:31,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7498 states and 19343 transitions. [2022-01-18 14:18:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:31,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:31,739 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:31,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 14:18:31,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 14:18:31,940 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash 918712966, now seen corresponding path program 26 times [2022-01-18 14:18:31,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915076179] [2022-01-18 14:18:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:31,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:32,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915076179] [2022-01-18 14:18:32,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915076179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658149426] [2022-01-18 14:18:32,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:32,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:32,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:32,023 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:32,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 14:18:32,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:32,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:32,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:32,189 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:32,190 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 15 [2022-01-18 14:18:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:32,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658149426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:32,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:32,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:32,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455734910] [2022-01-18 14:18:32,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:32,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:32,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:32,277 INFO L87 Difference]: Start difference. First operand 7498 states and 19343 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:32,544 INFO L93 Difference]: Finished difference Result 8461 states and 21367 transitions. [2022-01-18 14:18:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:32,555 INFO L225 Difference]: With dead ends: 8461 [2022-01-18 14:18:32,555 INFO L226 Difference]: Without dead ends: 8443 [2022-01-18 14:18:32,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:32,555 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 115 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:32,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 232 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8443 states. [2022-01-18 14:18:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8443 to 7584. [2022-01-18 14:18:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7584 states, 7583 states have (on average 2.57734405907952) internal successors, (19544), 7583 states have internal predecessors, (19544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7584 states to 7584 states and 19544 transitions. [2022-01-18 14:18:32,656 INFO L78 Accepts]: Start accepts. Automaton has 7584 states and 19544 transitions. Word has length 41 [2022-01-18 14:18:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:32,656 INFO L470 AbstractCegarLoop]: Abstraction has 7584 states and 19544 transitions. [2022-01-18 14:18:32,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7584 states and 19544 transitions. [2022-01-18 14:18:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:32,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:32,663 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:32,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 14:18:32,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-18 14:18:32,863 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1875921338, now seen corresponding path program 45 times [2022-01-18 14:18:32,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549031129] [2022-01-18 14:18:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:32,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:32,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549031129] [2022-01-18 14:18:32,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549031129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718369289] [2022-01-18 14:18:32,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:32,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:32,936 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:32,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 14:18:32,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:18:32,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:33,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:33,112 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:33,112 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 15 [2022-01-18 14:18:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:33,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718369289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:33,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:33,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-18 14:18:33,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74013282] [2022-01-18 14:18:33,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:33,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:33,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:33,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:33,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:33,191 INFO L87 Difference]: Start difference. First operand 7584 states and 19544 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:33,508 INFO L93 Difference]: Finished difference Result 8061 states and 20446 transitions. [2022-01-18 14:18:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:33,519 INFO L225 Difference]: With dead ends: 8061 [2022-01-18 14:18:33,519 INFO L226 Difference]: Without dead ends: 7979 [2022-01-18 14:18:33,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:33,520 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:33,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 287 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-01-18 14:18:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7509. [2022-01-18 14:18:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7509 states, 7508 states have (on average 2.5712573255194457) internal successors, (19305), 7508 states have internal predecessors, (19305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7509 states to 7509 states and 19305 transitions. [2022-01-18 14:18:33,623 INFO L78 Accepts]: Start accepts. Automaton has 7509 states and 19305 transitions. Word has length 41 [2022-01-18 14:18:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:33,623 INFO L470 AbstractCegarLoop]: Abstraction has 7509 states and 19305 transitions. [2022-01-18 14:18:33,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7509 states and 19305 transitions. [2022-01-18 14:18:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:33,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:33,632 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:33,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 14:18:33,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-01-18 14:18:33,833 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 880111234, now seen corresponding path program 27 times [2022-01-18 14:18:33,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:33,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439066915] [2022-01-18 14:18:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:33,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:33,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439066915] [2022-01-18 14:18:33,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439066915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474537680] [2022-01-18 14:18:33,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:33,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:33,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:33,932 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:33,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 14:18:33,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 14:18:33,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:33,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:34,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:34,079 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:34,079 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 20 treesize of output 19 [2022-01-18 14:18:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474537680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:34,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:34,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:18:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651210690] [2022-01-18 14:18:34,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:18:34,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:18:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:34,131 INFO L87 Difference]: Start difference. First operand 7509 states and 19305 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:34,457 INFO L93 Difference]: Finished difference Result 9398 states and 23397 transitions. [2022-01-18 14:18:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:18:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:34,468 INFO L225 Difference]: With dead ends: 9398 [2022-01-18 14:18:34,468 INFO L226 Difference]: Without dead ends: 9332 [2022-01-18 14:18:34,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:18:34,469 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:34,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 205 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2022-01-18 14:18:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 7487. [2022-01-18 14:18:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 2.569329414907828) internal successors, (19234), 7486 states have internal predecessors, (19234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 19234 transitions. [2022-01-18 14:18:34,572 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 19234 transitions. Word has length 41 [2022-01-18 14:18:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:34,572 INFO L470 AbstractCegarLoop]: Abstraction has 7487 states and 19234 transitions. [2022-01-18 14:18:34,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 19234 transitions. [2022-01-18 14:18:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:34,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:34,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:34,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 14:18:34,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 14:18:34,779 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash 718059138, now seen corresponding path program 46 times [2022-01-18 14:18:34,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:34,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076880662] [2022-01-18 14:18:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:34,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:34,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:34,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076880662] [2022-01-18 14:18:34,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076880662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:34,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271387759] [2022-01-18 14:18:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:34,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:34,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:34,878 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:34,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 14:18:34,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:34,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:34,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:35,160 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:35,160 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 20 treesize of output 19 [2022-01-18 14:18:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:35,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271387759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:35,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:35,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 14:18:35,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110776034] [2022-01-18 14:18:35,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:18:35,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:18:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:18:35,214 INFO L87 Difference]: Start difference. First operand 7487 states and 19234 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:35,450 INFO L93 Difference]: Finished difference Result 7610 states and 19452 transitions. [2022-01-18 14:18:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:18:35,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:35,459 INFO L225 Difference]: With dead ends: 7610 [2022-01-18 14:18:35,459 INFO L226 Difference]: Without dead ends: 7557 [2022-01-18 14:18:35,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:18:35,459 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 148 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 625 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-01-18 14:18:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2022-01-18 14:18:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 7478. [2022-01-18 14:18:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7478 states, 7477 states have (on average 2.5672060987026883) internal successors, (19195), 7477 states have internal predecessors, (19195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 19195 transitions. [2022-01-18 14:18:35,557 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 19195 transitions. Word has length 41 [2022-01-18 14:18:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:35,557 INFO L470 AbstractCegarLoop]: Abstraction has 7478 states and 19195 transitions. [2022-01-18 14:18:35,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 19195 transitions. [2022-01-18 14:18:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:35,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:35,563 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:35,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 14:18:35,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:35,773 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 856335594, now seen corresponding path program 28 times [2022-01-18 14:18:35,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:35,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798985316] [2022-01-18 14:18:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:35,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:35,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798985316] [2022-01-18 14:18:35,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798985316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758818559] [2022-01-18 14:18:35,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:35,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:35,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:35,849 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:35,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 14:18:35,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:35,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:35,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:35,999 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:35,999 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 20 treesize of output 19 [2022-01-18 14:18:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:36,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758818559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:36,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:36,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:18:36,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269804380] [2022-01-18 14:18:36,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:36,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:18:36,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:36,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:18:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:18:36,061 INFO L87 Difference]: Start difference. First operand 7478 states and 19195 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:36,372 INFO L93 Difference]: Finished difference Result 8785 states and 22005 transitions. [2022-01-18 14:18:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:18:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:36,383 INFO L225 Difference]: With dead ends: 8785 [2022-01-18 14:18:36,383 INFO L226 Difference]: Without dead ends: 8765 [2022-01-18 14:18:36,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:18:36,384 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 99 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:36,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 237 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8765 states. [2022-01-18 14:18:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8765 to 7219. [2022-01-18 14:18:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 2.5854807425879747) internal successors, (18662), 7218 states have internal predecessors, (18662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 18662 transitions. [2022-01-18 14:18:36,503 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 18662 transitions. Word has length 41 [2022-01-18 14:18:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:36,503 INFO L470 AbstractCegarLoop]: Abstraction has 7219 states and 18662 transitions. [2022-01-18 14:18:36,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 18662 transitions. [2022-01-18 14:18:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:36,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:36,509 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:36,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:36,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:36,709 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 679444650, now seen corresponding path program 47 times [2022-01-18 14:18:36,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:36,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745804267] [2022-01-18 14:18:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:36,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:36,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745804267] [2022-01-18 14:18:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745804267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588259631] [2022-01-18 14:18:36,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:36,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:36,797 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:36,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 14:18:36,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:18:36,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:36,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:37,040 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:37,040 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 20 treesize of output 19 [2022-01-18 14:18:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:37,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588259631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:37,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:37,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 14:18:37,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997805800] [2022-01-18 14:18:37,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:37,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:18:37,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:18:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:18:37,103 INFO L87 Difference]: Start difference. First operand 7219 states and 18662 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:37,302 INFO L93 Difference]: Finished difference Result 7314 states and 18822 transitions. [2022-01-18 14:18:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:18:37,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:37,311 INFO L225 Difference]: With dead ends: 7314 [2022-01-18 14:18:37,311 INFO L226 Difference]: Without dead ends: 7276 [2022-01-18 14:18:37,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:18:37,312 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:37,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 115 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2022-01-18 14:18:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7197. [2022-01-18 14:18:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 2.5849082823790996) internal successors, (18601), 7196 states have internal predecessors, (18601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 18601 transitions. [2022-01-18 14:18:37,404 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 18601 transitions. Word has length 41 [2022-01-18 14:18:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:37,404 INFO L470 AbstractCegarLoop]: Abstraction has 7197 states and 18601 transitions. [2022-01-18 14:18:37,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 18601 transitions. [2022-01-18 14:18:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:37,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:37,410 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:37,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 14:18:37,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 14:18:37,612 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1646311550, now seen corresponding path program 29 times [2022-01-18 14:18:37,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142963546] [2022-01-18 14:18:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:37,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:37,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142963546] [2022-01-18 14:18:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142963546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088486731] [2022-01-18 14:18:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:37,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:37,681 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:37,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 14:18:37,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:18:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:37,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:37,834 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:37,835 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 20 treesize of output 19 [2022-01-18 14:18:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:37,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088486731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:37,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:37,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:18:37,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49016283] [2022-01-18 14:18:37,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:37,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:18:37,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:18:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:18:37,906 INFO L87 Difference]: Start difference. First operand 7197 states and 18601 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:38,188 INFO L93 Difference]: Finished difference Result 8076 states and 20471 transitions. [2022-01-18 14:18:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:18:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:38,198 INFO L225 Difference]: With dead ends: 8076 [2022-01-18 14:18:38,199 INFO L226 Difference]: Without dead ends: 8076 [2022-01-18 14:18:38,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:18:38,199 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:38,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 221 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2022-01-18 14:18:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 7201. [2022-01-18 14:18:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.5844444444444443) internal successors, (18608), 7200 states have internal predecessors, (18608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 18608 transitions. [2022-01-18 14:18:38,292 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 18608 transitions. Word has length 41 [2022-01-18 14:18:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:38,292 INFO L470 AbstractCegarLoop]: Abstraction has 7201 states and 18608 transitions. [2022-01-18 14:18:38,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 18608 transitions. [2022-01-18 14:18:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:38,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:38,297 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:38,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:38,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 14:18:38,498 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:38,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1015359362, now seen corresponding path program 48 times [2022-01-18 14:18:38,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:38,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307275563] [2022-01-18 14:18:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:38,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:38,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:38,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307275563] [2022-01-18 14:18:38,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307275563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:38,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910983382] [2022-01-18 14:18:38,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:38,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:38,577 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:38,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 14:18:38,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 14:18:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:38,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:18:38,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:38,858 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:18:38,858 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-01-18 14:18:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:39,388 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:39,389 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 15 [2022-01-18 14:18:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:39,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910983382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:39,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 12] total 22 [2022-01-18 14:18:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623162344] [2022-01-18 14:18:39,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:18:39,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:39,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:18:39,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:18:39,579 INFO L87 Difference]: Start difference. First operand 7201 states and 18608 transitions. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:40,848 INFO L93 Difference]: Finished difference Result 10756 states and 27009 transitions. [2022-01-18 14:18:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 14:18:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:40,863 INFO L225 Difference]: With dead ends: 10756 [2022-01-18 14:18:40,863 INFO L226 Difference]: Without dead ends: 10731 [2022-01-18 14:18:40,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 14:18:40,864 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 300 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:40,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 508 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1444 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-01-18 14:18:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2022-01-18 14:18:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 7098. [2022-01-18 14:18:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 7097 states have (on average 2.5908130195857404) internal successors, (18387), 7097 states have internal predecessors, (18387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 18387 transitions. [2022-01-18 14:18:40,989 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 18387 transitions. Word has length 41 [2022-01-18 14:18:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:40,989 INFO L470 AbstractCegarLoop]: Abstraction has 7098 states and 18387 transitions. [2022-01-18 14:18:40,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 18387 transitions. [2022-01-18 14:18:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:40,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:40,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:41,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 14:18:41,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 14:18:41,196 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1926296578, now seen corresponding path program 49 times [2022-01-18 14:18:41,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:41,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805158887] [2022-01-18 14:18:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:41,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:18:41,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805158887] [2022-01-18 14:18:41,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805158887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678091865] [2022-01-18 14:18:41,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:41,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:41,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:41,292 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:41,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 14:18:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:18:41,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:41,427 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:41,428 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 15 [2022-01-18 14:18:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:18:41,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678091865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:41,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:41,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:41,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095415888] [2022-01-18 14:18:41,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:41,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:41,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:41,511 INFO L87 Difference]: Start difference. First operand 7098 states and 18387 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:41,722 INFO L93 Difference]: Finished difference Result 7714 states and 19693 transitions. [2022-01-18 14:18:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:41,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:41,732 INFO L225 Difference]: With dead ends: 7714 [2022-01-18 14:18:41,732 INFO L226 Difference]: Without dead ends: 7702 [2022-01-18 14:18:41,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:41,733 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:41,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 162 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2022-01-18 14:18:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 7140. [2022-01-18 14:18:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 2.5892982210393614) internal successors, (18485), 7139 states have internal predecessors, (18485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 18485 transitions. [2022-01-18 14:18:41,844 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 18485 transitions. Word has length 41 [2022-01-18 14:18:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 18485 transitions. [2022-01-18 14:18:41,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 18485 transitions. [2022-01-18 14:18:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:41,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:41,850 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:41,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:42,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 14:18:42,050 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1726020235, now seen corresponding path program 30 times [2022-01-18 14:18:42,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:42,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218502908] [2022-01-18 14:18:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:42,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:42,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218502908] [2022-01-18 14:18:42,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218502908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595485205] [2022-01-18 14:18:42,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:42,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:42,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:42,127 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:42,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 14:18:42,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:18:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:42,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:42,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595485205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:42,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:42,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 17 [2022-01-18 14:18:42,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757039023] [2022-01-18 14:18:42,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:42,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:18:42,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:18:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:42,408 INFO L87 Difference]: Start difference. First operand 7140 states and 18485 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:42,660 INFO L93 Difference]: Finished difference Result 8165 states and 20548 transitions. [2022-01-18 14:18:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:18:42,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:42,670 INFO L225 Difference]: With dead ends: 8165 [2022-01-18 14:18:42,671 INFO L226 Difference]: Without dead ends: 8123 [2022-01-18 14:18:42,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:42,671 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 212 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:42,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 184 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2022-01-18 14:18:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 5818. [2022-01-18 14:18:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 2.5404847859721507) internal successors, (14778), 5817 states have internal predecessors, (14778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 14778 transitions. [2022-01-18 14:18:42,752 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 14778 transitions. Word has length 41 [2022-01-18 14:18:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:42,752 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 14778 transitions. [2022-01-18 14:18:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 14778 transitions. [2022-01-18 14:18:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:42,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:42,757 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:42,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 14:18:42,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 14:18:42,959 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1466471446, now seen corresponding path program 31 times [2022-01-18 14:18:42,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958215506] [2022-01-18 14:18:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:42,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:43,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958215506] [2022-01-18 14:18:43,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958215506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692814578] [2022-01-18 14:18:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:43,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:43,035 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:43,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 14:18:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:43,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:43,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:43,202 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:43,202 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 15 [2022-01-18 14:18:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692814578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:43,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:43,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 14:18:43,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111120333] [2022-01-18 14:18:43,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:43,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:18:43,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:18:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:18:43,300 INFO L87 Difference]: Start difference. First operand 5818 states and 14778 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:43,592 INFO L93 Difference]: Finished difference Result 7063 states and 17450 transitions. [2022-01-18 14:18:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:43,603 INFO L225 Difference]: With dead ends: 7063 [2022-01-18 14:18:43,603 INFO L226 Difference]: Without dead ends: 7020 [2022-01-18 14:18:43,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:43,604 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:43,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 244 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2022-01-18 14:18:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 6154. [2022-01-18 14:18:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 2.532098163497481) internal successors, (15580), 6153 states have internal predecessors, (15580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 15580 transitions. [2022-01-18 14:18:43,689 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 15580 transitions. Word has length 41 [2022-01-18 14:18:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:43,690 INFO L470 AbstractCegarLoop]: Abstraction has 6154 states and 15580 transitions. [2022-01-18 14:18:43,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 15580 transitions. [2022-01-18 14:18:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:43,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:43,695 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:43,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 14:18:43,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-18 14:18:43,896 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash 33861546, now seen corresponding path program 50 times [2022-01-18 14:18:43,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:43,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649395461] [2022-01-18 14:18:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:43,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:43,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:43,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649395461] [2022-01-18 14:18:43,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649395461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:43,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385885913] [2022-01-18 14:18:43,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:43,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:43,972 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:43,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 14:18:43,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:43,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:18:43,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:44,097 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 16 treesize of output 12 [2022-01-18 14:18:44,098 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 8 treesize of output 1 [2022-01-18 14:18:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:44,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:44,156 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:18:44,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 14:18:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:44,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385885913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:44,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:44,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-01-18 14:18:44,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433157562] [2022-01-18 14:18:44,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:44,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:18:44,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:18:44,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:44,335 INFO L87 Difference]: Start difference. First operand 6154 states and 15580 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:44,748 INFO L93 Difference]: Finished difference Result 7761 states and 18910 transitions. [2022-01-18 14:18:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:18:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:44,759 INFO L225 Difference]: With dead ends: 7761 [2022-01-18 14:18:44,759 INFO L226 Difference]: Without dead ends: 7497 [2022-01-18 14:18:44,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:18:44,759 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 174 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:44,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 351 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7497 states. [2022-01-18 14:18:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7497 to 5997. [2022-01-18 14:18:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 2.5320213475650433) internal successors, (15182), 5996 states have internal predecessors, (15182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 15182 transitions. [2022-01-18 14:18:44,835 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 15182 transitions. Word has length 41 [2022-01-18 14:18:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:44,835 INFO L470 AbstractCegarLoop]: Abstraction has 5997 states and 15182 transitions. [2022-01-18 14:18:44,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 15182 transitions. [2022-01-18 14:18:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:44,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:44,840 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:44,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 14:18:45,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:45,040 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2066935159, now seen corresponding path program 51 times [2022-01-18 14:18:45,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828884201] [2022-01-18 14:18:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:45,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:45,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828884201] [2022-01-18 14:18:45,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828884201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248313922] [2022-01-18 14:18:45,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:45,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:45,106 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:45,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 14:18:45,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 14:18:45,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:45,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:45,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248313922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:45,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:45,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-01-18 14:18:45,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031031414] [2022-01-18 14:18:45,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:18:45,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:18:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:18:45,435 INFO L87 Difference]: Start difference. First operand 5997 states and 15182 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:45,599 INFO L93 Difference]: Finished difference Result 7969 states and 19393 transitions. [2022-01-18 14:18:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:18:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:45,609 INFO L225 Difference]: With dead ends: 7969 [2022-01-18 14:18:45,610 INFO L226 Difference]: Without dead ends: 7939 [2022-01-18 14:18:45,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:45,610 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 150 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:45,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 103 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7939 states. [2022-01-18 14:18:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7939 to 6276. [2022-01-18 14:18:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 6275 states have (on average 2.5472509960159364) internal successors, (15984), 6275 states have internal predecessors, (15984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 15984 transitions. [2022-01-18 14:18:45,694 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 15984 transitions. Word has length 41 [2022-01-18 14:18:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:45,694 INFO L470 AbstractCegarLoop]: Abstraction has 6276 states and 15984 transitions. [2022-01-18 14:18:45,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 15984 transitions. [2022-01-18 14:18:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:45,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:45,699 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:45,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 14:18:45,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:45,899 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2103681911, now seen corresponding path program 52 times [2022-01-18 14:18:45,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:45,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429983211] [2022-01-18 14:18:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:45,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:45,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429983211] [2022-01-18 14:18:45,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429983211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653204614] [2022-01-18 14:18:45,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:45,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:45,992 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:45,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 14:18:46,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:46,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:46,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653204614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:46,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:46,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-01-18 14:18:46,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873784325] [2022-01-18 14:18:46,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:46,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:18:46,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:18:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:18:46,312 INFO L87 Difference]: Start difference. First operand 6276 states and 15984 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:46,503 INFO L93 Difference]: Finished difference Result 8194 states and 19785 transitions. [2022-01-18 14:18:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:18:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:46,514 INFO L225 Difference]: With dead ends: 8194 [2022-01-18 14:18:46,514 INFO L226 Difference]: Without dead ends: 8134 [2022-01-18 14:18:46,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:46,514 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:46,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 113 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:18:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8134 states. [2022-01-18 14:18:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8134 to 6276. [2022-01-18 14:18:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 6275 states have (on average 2.545019920318725) internal successors, (15970), 6275 states have internal predecessors, (15970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 15970 transitions. [2022-01-18 14:18:46,640 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 15970 transitions. Word has length 41 [2022-01-18 14:18:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:46,640 INFO L470 AbstractCegarLoop]: Abstraction has 6276 states and 15970 transitions. [2022-01-18 14:18:46,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 15970 transitions. [2022-01-18 14:18:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:46,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:46,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:46,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 14:18:46,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:46,845 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1504073858, now seen corresponding path program 53 times [2022-01-18 14:18:46,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:46,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315115001] [2022-01-18 14:18:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:46,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:46,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315115001] [2022-01-18 14:18:46,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315115001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899937301] [2022-01-18 14:18:46,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:46,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:46,936 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:46,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 14:18:46,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 14:18:46,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:46,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:47,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:47,090 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:47,090 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 20 treesize of output 19 [2022-01-18 14:18:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:47,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899937301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:47,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:47,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:18:47,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763428661] [2022-01-18 14:18:47,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:18:47,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:18:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:47,150 INFO L87 Difference]: Start difference. First operand 6276 states and 15970 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:47,515 INFO L93 Difference]: Finished difference Result 8204 states and 19910 transitions. [2022-01-18 14:18:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:18:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:47,525 INFO L225 Difference]: With dead ends: 8204 [2022-01-18 14:18:47,525 INFO L226 Difference]: Without dead ends: 7841 [2022-01-18 14:18:47,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:18:47,525 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:47,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 164 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2022-01-18 14:18:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 5950. [2022-01-18 14:18:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5950 states, 5949 states have (on average 2.533198856950748) internal successors, (15070), 5949 states have internal predecessors, (15070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5950 states to 5950 states and 15070 transitions. [2022-01-18 14:18:47,602 INFO L78 Accepts]: Start accepts. Automaton has 5950 states and 15070 transitions. Word has length 41 [2022-01-18 14:18:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:47,602 INFO L470 AbstractCegarLoop]: Abstraction has 5950 states and 15070 transitions. [2022-01-18 14:18:47,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 5950 states and 15070 transitions. [2022-01-18 14:18:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:47,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:47,607 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:47,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 14:18:47,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:47,808 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1266012341, now seen corresponding path program 32 times [2022-01-18 14:18:47,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:47,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480449971] [2022-01-18 14:18:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:47,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:47,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480449971] [2022-01-18 14:18:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480449971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945700850] [2022-01-18 14:18:47,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:47,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:47,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:47,880 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:47,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 14:18:47,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:47,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:48,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:48,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945700850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:48,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:48,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-01-18 14:18:48,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265949397] [2022-01-18 14:18:48,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:48,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:18:48,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:18:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:18:48,233 INFO L87 Difference]: Start difference. First operand 5950 states and 15070 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:48,571 INFO L93 Difference]: Finished difference Result 7335 states and 18009 transitions. [2022-01-18 14:18:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:18:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:48,581 INFO L225 Difference]: With dead ends: 7335 [2022-01-18 14:18:48,581 INFO L226 Difference]: Without dead ends: 7305 [2022-01-18 14:18:48,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:18:48,581 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 201 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:48,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 218 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7305 states. [2022-01-18 14:18:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7305 to 6289. [2022-01-18 14:18:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 6288 states have (on average 2.55089058524173) internal successors, (16040), 6288 states have internal predecessors, (16040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 16040 transitions. [2022-01-18 14:18:48,664 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 16040 transitions. Word has length 41 [2022-01-18 14:18:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:48,664 INFO L470 AbstractCegarLoop]: Abstraction has 6289 states and 16040 transitions. [2022-01-18 14:18:48,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 16040 transitions. [2022-01-18 14:18:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:48,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:48,671 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:48,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:48,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-01-18 14:18:48,892 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash 644131931, now seen corresponding path program 33 times [2022-01-18 14:18:48,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:48,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848234085] [2022-01-18 14:18:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:48,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:48,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:48,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848234085] [2022-01-18 14:18:48,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848234085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:48,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361445871] [2022-01-18 14:18:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:48,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:48,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:48,958 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:48,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 14:18:48,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:18:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:49,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361445871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:49,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-01-18 14:18:49,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726790056] [2022-01-18 14:18:49,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:49,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:18:49,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:18:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:18:49,269 INFO L87 Difference]: Start difference. First operand 6289 states and 16040 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:49,621 INFO L93 Difference]: Finished difference Result 8957 states and 21773 transitions. [2022-01-18 14:18:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:18:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:49,632 INFO L225 Difference]: With dead ends: 8957 [2022-01-18 14:18:49,633 INFO L226 Difference]: Without dead ends: 8957 [2022-01-18 14:18:49,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:18:49,633 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 458 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:49,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 130 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2022-01-18 14:18:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 6352. [2022-01-18 14:18:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6352 states, 6351 states have (on average 2.555188159344985) internal successors, (16228), 6351 states have internal predecessors, (16228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6352 states to 6352 states and 16228 transitions. [2022-01-18 14:18:49,743 INFO L78 Accepts]: Start accepts. Automaton has 6352 states and 16228 transitions. Word has length 41 [2022-01-18 14:18:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 6352 states and 16228 transitions. [2022-01-18 14:18:49,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6352 states and 16228 transitions. [2022-01-18 14:18:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:49,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:49,749 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:49,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:49,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 14:18:49,950 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1611531607, now seen corresponding path program 34 times [2022-01-18 14:18:49,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:49,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019108034] [2022-01-18 14:18:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:49,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:50,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019108034] [2022-01-18 14:18:50,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019108034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480149584] [2022-01-18 14:18:50,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:50,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:50,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:50,039 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:50,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 14:18:50,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:50,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:50,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:18:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 38 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:50,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480149584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:50,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:50,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 21 [2022-01-18 14:18:50,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990248580] [2022-01-18 14:18:50,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:50,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:18:50,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:18:50,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:18:50,572 INFO L87 Difference]: Start difference. First operand 6352 states and 16228 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:51,144 INFO L93 Difference]: Finished difference Result 9472 states and 23437 transitions. [2022-01-18 14:18:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:18:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:51,157 INFO L225 Difference]: With dead ends: 9472 [2022-01-18 14:18:51,157 INFO L226 Difference]: Without dead ends: 9459 [2022-01-18 14:18:51,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=841, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:18:51,157 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 393 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:51,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 235 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:18:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9459 states. [2022-01-18 14:18:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9459 to 6169. [2022-01-18 14:18:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6168 states have (on average 2.5372892347600517) internal successors, (15650), 6168 states have internal predecessors, (15650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 15650 transitions. [2022-01-18 14:18:51,270 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 15650 transitions. Word has length 41 [2022-01-18 14:18:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:51,270 INFO L470 AbstractCegarLoop]: Abstraction has 6169 states and 15650 transitions. [2022-01-18 14:18:51,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 15650 transitions. [2022-01-18 14:18:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 14:18:51,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:51,276 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:51,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 14:18:51,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:51,476 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2041475785, now seen corresponding path program 54 times [2022-01-18 14:18:51,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068607282] [2022-01-18 14:18:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:51,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:51,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068607282] [2022-01-18 14:18:51,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068607282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025529191] [2022-01-18 14:18:51,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:51,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:51,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:51,570 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:51,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 14:18:51,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:18:51,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:51,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:18:51,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:51,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:51,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025529191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:51,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:51,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2022-01-18 14:18:51,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518997327] [2022-01-18 14:18:51,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:51,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:18:51,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:51,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:18:51,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:18:51,902 INFO L87 Difference]: Start difference. First operand 6169 states and 15650 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:52,157 INFO L93 Difference]: Finished difference Result 7598 states and 18548 transitions. [2022-01-18 14:18:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:18:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 14:18:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:52,166 INFO L225 Difference]: With dead ends: 7598 [2022-01-18 14:18:52,167 INFO L226 Difference]: Without dead ends: 7507 [2022-01-18 14:18:52,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:18:52,167 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 182 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:52,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 171 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2022-01-18 14:18:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 6112. [2022-01-18 14:18:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 2.5391916216658483) internal successors, (15517), 6111 states have internal predecessors, (15517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 15517 transitions. [2022-01-18 14:18:52,246 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 15517 transitions. Word has length 41 [2022-01-18 14:18:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:52,246 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 15517 transitions. [2022-01-18 14:18:52,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 15517 transitions. [2022-01-18 14:18:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 14:18:52,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:52,252 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:52,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 14:18:52,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 14:18:52,452 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 554202670, now seen corresponding path program 35 times [2022-01-18 14:18:52,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734171386] [2022-01-18 14:18:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:52,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:18:52,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734171386] [2022-01-18 14:18:52,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734171386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826621735] [2022-01-18 14:18:52,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:52,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:52,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:52,549 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:52,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 14:18:52,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 14:18:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:18:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:52,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:52,712 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:52,712 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 20 treesize of output 19 [2022-01-18 14:18:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826621735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:52,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:52,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:18:52,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820744813] [2022-01-18 14:18:52,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:52,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:18:52,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:18:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:18:52,766 INFO L87 Difference]: Start difference. First operand 6112 states and 15517 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:53,115 INFO L93 Difference]: Finished difference Result 7851 states and 19160 transitions. [2022-01-18 14:18:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:18:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 14:18:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:53,125 INFO L225 Difference]: With dead ends: 7851 [2022-01-18 14:18:53,125 INFO L226 Difference]: Without dead ends: 7366 [2022-01-18 14:18:53,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:18:53,125 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:53,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 152 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2022-01-18 14:18:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 5090. [2022-01-18 14:18:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5090 states, 5089 states have (on average 2.5356651601493416) internal successors, (12904), 5089 states have internal predecessors, (12904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 12904 transitions. [2022-01-18 14:18:53,191 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 12904 transitions. Word has length 44 [2022-01-18 14:18:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:53,191 INFO L470 AbstractCegarLoop]: Abstraction has 5090 states and 12904 transitions. [2022-01-18 14:18:53,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 12904 transitions. [2022-01-18 14:18:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 14:18:53,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:53,195 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:53,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:53,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 14:18:53,396 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 831381294, now seen corresponding path program 55 times [2022-01-18 14:18:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967644308] [2022-01-18 14:18:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:53,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:18:53,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967644308] [2022-01-18 14:18:53,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967644308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498787286] [2022-01-18 14:18:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:18:53,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:53,455 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:53,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 14:18:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:18:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:53,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:53,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498787286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:53,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:53,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 19 [2022-01-18 14:18:53,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540632722] [2022-01-18 14:18:53,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:53,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:18:53,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:53,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:18:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:18:53,981 INFO L87 Difference]: Start difference. First operand 5090 states and 12904 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:54,877 INFO L93 Difference]: Finished difference Result 6929 states and 16718 transitions. [2022-01-18 14:18:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:18:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 14:18:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:54,886 INFO L225 Difference]: With dead ends: 6929 [2022-01-18 14:18:54,886 INFO L226 Difference]: Without dead ends: 6876 [2022-01-18 14:18:54,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 14:18:54,887 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 512 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 570 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:18:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2022-01-18 14:18:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5518. [2022-01-18 14:18:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 2.5261917708899766) internal successors, (13937), 5517 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 13937 transitions. [2022-01-18 14:18:54,956 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 13937 transitions. Word has length 44 [2022-01-18 14:18:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:54,956 INFO L470 AbstractCegarLoop]: Abstraction has 5518 states and 13937 transitions. [2022-01-18 14:18:54,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 13937 transitions. [2022-01-18 14:18:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 14:18:54,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:54,961 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:54,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 14:18:55,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:55,162 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash -945685074, now seen corresponding path program 56 times [2022-01-18 14:18:55,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:55,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804754794] [2022-01-18 14:18:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:55,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:55,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:55,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804754794] [2022-01-18 14:18:55,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804754794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:55,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675788736] [2022-01-18 14:18:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:18:55,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:55,224 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:55,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 14:18:55,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:18:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:18:55,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:55,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:18:55,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675788736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:55,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:55,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2022-01-18 14:18:55,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039531965] [2022-01-18 14:18:55,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:55,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:18:55,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:18:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:55,621 INFO L87 Difference]: Start difference. First operand 5518 states and 13937 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:56,191 INFO L93 Difference]: Finished difference Result 7876 states and 18896 transitions. [2022-01-18 14:18:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:18:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 14:18:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:56,202 INFO L225 Difference]: With dead ends: 7876 [2022-01-18 14:18:56,202 INFO L226 Difference]: Without dead ends: 7790 [2022-01-18 14:18:56,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:18:56,202 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 327 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:56,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 447 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:18:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-01-18 14:18:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 5713. [2022-01-18 14:18:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5713 states, 5712 states have (on average 2.527310924369748) internal successors, (14436), 5712 states have internal predecessors, (14436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5713 states to 5713 states and 14436 transitions. [2022-01-18 14:18:56,277 INFO L78 Accepts]: Start accepts. Automaton has 5713 states and 14436 transitions. Word has length 44 [2022-01-18 14:18:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:56,277 INFO L470 AbstractCegarLoop]: Abstraction has 5713 states and 14436 transitions. [2022-01-18 14:18:56,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5713 states and 14436 transitions. [2022-01-18 14:18:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 14:18:56,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:56,282 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:56,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 14:18:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:56,482 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 870670370, now seen corresponding path program 57 times [2022-01-18 14:18:56,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062877275] [2022-01-18 14:18:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:56,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:56,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062877275] [2022-01-18 14:18:56,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062877275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299163680] [2022-01-18 14:18:56,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:18:56,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:56,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:56,543 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:56,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 14:18:56,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 14:18:56,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 14:18:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:56,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:56,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299163680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:56,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:56,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-01-18 14:18:56,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794104493] [2022-01-18 14:18:56,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:56,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:18:56,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:56,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:18:56,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:18:56,809 INFO L87 Difference]: Start difference. First operand 5713 states and 14436 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:57,008 INFO L93 Difference]: Finished difference Result 6518 states and 16133 transitions. [2022-01-18 14:18:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:18:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 14:18:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:57,016 INFO L225 Difference]: With dead ends: 6518 [2022-01-18 14:18:57,016 INFO L226 Difference]: Without dead ends: 6463 [2022-01-18 14:18:57,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:18:57,016 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:57,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 215 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6463 states. [2022-01-18 14:18:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 5774. [2022-01-18 14:18:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5774 states, 5773 states have (on average 2.5174086263641087) internal successors, (14533), 5773 states have internal predecessors, (14533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 14533 transitions. [2022-01-18 14:18:57,082 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 14533 transitions. Word has length 44 [2022-01-18 14:18:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:57,082 INFO L470 AbstractCegarLoop]: Abstraction has 5774 states and 14533 transitions. [2022-01-18 14:18:57,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 14533 transitions. [2022-01-18 14:18:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 14:18:57,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:57,087 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:57,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 14:18:57,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 14:18:57,288 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1834663790, now seen corresponding path program 58 times [2022-01-18 14:18:57,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483584867] [2022-01-18 14:18:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:57,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:57,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483584867] [2022-01-18 14:18:57,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483584867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597275794] [2022-01-18 14:18:57,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:18:57,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:57,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:57,345 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:57,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 14:18:57,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:18:57,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 14:18:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:57,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:18:57,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597275794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:57,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:57,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-01-18 14:18:57,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066146936] [2022-01-18 14:18:57,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:57,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:18:57,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:18:57,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:18:57,591 INFO L87 Difference]: Start difference. First operand 5774 states and 14533 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:57,793 INFO L93 Difference]: Finished difference Result 6620 states and 16340 transitions. [2022-01-18 14:18:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:18:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 14:18:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:57,801 INFO L225 Difference]: With dead ends: 6620 [2022-01-18 14:18:57,801 INFO L226 Difference]: Without dead ends: 6583 [2022-01-18 14:18:57,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:18:57,802 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:57,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 215 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:18:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-01-18 14:18:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 5870. [2022-01-18 14:18:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 5869 states have (on average 2.508263758732322) internal successors, (14721), 5869 states have internal predecessors, (14721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 14721 transitions. [2022-01-18 14:18:57,869 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 14721 transitions. Word has length 44 [2022-01-18 14:18:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:57,870 INFO L470 AbstractCegarLoop]: Abstraction has 5870 states and 14721 transitions. [2022-01-18 14:18:57,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 14721 transitions. [2022-01-18 14:18:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 14:18:57,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:57,875 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:57,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 14:18:58,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:58,075 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash 678113582, now seen corresponding path program 59 times [2022-01-18 14:18:58,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911196547] [2022-01-18 14:18:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:58,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:18:58,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:58,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911196547] [2022-01-18 14:18:58,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911196547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:58,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176139962] [2022-01-18 14:18:58,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:18:58,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:58,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:58,138 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:58,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 14:18:58,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 14:18:58,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:18:58,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:58,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:58,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176139962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:58,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:58,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 17 [2022-01-18 14:18:58,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903525945] [2022-01-18 14:18:58,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:58,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:18:58,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:58,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:18:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:18:58,543 INFO L87 Difference]: Start difference. First operand 5870 states and 14721 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:18:59,283 INFO L93 Difference]: Finished difference Result 8381 states and 19886 transitions. [2022-01-18 14:18:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 14:18:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 14:18:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:18:59,294 INFO L225 Difference]: With dead ends: 8381 [2022-01-18 14:18:59,294 INFO L226 Difference]: Without dead ends: 8350 [2022-01-18 14:18:59,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:18:59,294 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 413 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:18:59,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 604 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:18:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2022-01-18 14:18:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 6049. [2022-01-18 14:18:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6049 states, 6048 states have (on average 2.4945436507936507) internal successors, (15087), 6048 states have internal predecessors, (15087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6049 states to 6049 states and 15087 transitions. [2022-01-18 14:18:59,373 INFO L78 Accepts]: Start accepts. Automaton has 6049 states and 15087 transitions. Word has length 44 [2022-01-18 14:18:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:18:59,373 INFO L470 AbstractCegarLoop]: Abstraction has 6049 states and 15087 transitions. [2022-01-18 14:18:59,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:18:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6049 states and 15087 transitions. [2022-01-18 14:18:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:18:59,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:18:59,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:18:59,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 14:18:59,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:59,579 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:18:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:18:59,579 INFO L85 PathProgramCache]: Analyzing trace with hash -98819019, now seen corresponding path program 36 times [2022-01-18 14:18:59,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:18:59,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906950224] [2022-01-18 14:18:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:18:59,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:18:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:18:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:59,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:18:59,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906950224] [2022-01-18 14:18:59,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906950224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:18:59,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650207348] [2022-01-18 14:18:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:18:59,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:18:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:18:59,697 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:18:59,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 14:18:59,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:18:59,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:18:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:18:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:18:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:59,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:18:59,873 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:18:59,874 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 20 treesize of output 19 [2022-01-18 14:18:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:18:59,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650207348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:18:59,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:18:59,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:18:59,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73828095] [2022-01-18 14:18:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:18:59,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:18:59,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:18:59,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:18:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:18:59,934 INFO L87 Difference]: Start difference. First operand 6049 states and 15087 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:00,549 INFO L93 Difference]: Finished difference Result 7892 states and 19138 transitions. [2022-01-18 14:19:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:19:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:00,559 INFO L225 Difference]: With dead ends: 7892 [2022-01-18 14:19:00,559 INFO L226 Difference]: Without dead ends: 7793 [2022-01-18 14:19:00,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:19:00,560 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 436 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:00,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 550 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-01-18 14:19:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6455. [2022-01-18 14:19:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6455 states, 6454 states have (on average 2.4806321660985438) internal successors, (16010), 6454 states have internal predecessors, (16010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6455 states to 6455 states and 16010 transitions. [2022-01-18 14:19:00,637 INFO L78 Accepts]: Start accepts. Automaton has 6455 states and 16010 transitions. Word has length 47 [2022-01-18 14:19:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:00,637 INFO L470 AbstractCegarLoop]: Abstraction has 6455 states and 16010 transitions. [2022-01-18 14:19:00,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6455 states and 16010 transitions. [2022-01-18 14:19:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:00,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:00,643 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:00,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 14:19:00,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:00,843 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2073614069, now seen corresponding path program 60 times [2022-01-18 14:19:00,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:00,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013501809] [2022-01-18 14:19:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:00,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:00,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:00,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013501809] [2022-01-18 14:19:00,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013501809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:00,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614870389] [2022-01-18 14:19:00,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:00,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:00,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:00,923 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:00,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 14:19:00,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:19:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:19:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:01,311 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:19:01,311 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 16 [2022-01-18 14:19:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:01,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:01,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:01,437 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 15 [2022-01-18 14:19:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 35 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:02,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614870389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:02,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:02,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 30 [2022-01-18 14:19:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501154618] [2022-01-18 14:19:02,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:02,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:19:02,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:19:02,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:19:02,010 INFO L87 Difference]: Start difference. First operand 6455 states and 16010 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:03,437 INFO L93 Difference]: Finished difference Result 8318 states and 19574 transitions. [2022-01-18 14:19:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 14:19:03,438 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:03,449 INFO L225 Difference]: With dead ends: 8318 [2022-01-18 14:19:03,449 INFO L226 Difference]: Without dead ends: 8286 [2022-01-18 14:19:03,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1202, Invalid=4054, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 14:19:03,450 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 566 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:03,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 741 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1567 Invalid, 0 Unknown, 743 Unchecked, 0.6s Time] [2022-01-18 14:19:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2022-01-18 14:19:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 6506. [2022-01-18 14:19:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 2.4799385088393544) internal successors, (16132), 6505 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 16132 transitions. [2022-01-18 14:19:03,533 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 16132 transitions. Word has length 47 [2022-01-18 14:19:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:03,533 INFO L470 AbstractCegarLoop]: Abstraction has 6506 states and 16132 transitions. [2022-01-18 14:19:03,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 16132 transitions. [2022-01-18 14:19:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:03,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:03,538 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:03,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 14:19:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:03,738 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1460077889, now seen corresponding path program 61 times [2022-01-18 14:19:03,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456306099] [2022-01-18 14:19:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:03,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:03,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456306099] [2022-01-18 14:19:03,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456306099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:03,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111130155] [2022-01-18 14:19:03,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:03,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:03,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:03,829 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:03,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 14:19:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:03,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:03,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:04,010 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:04,010 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 15 [2022-01-18 14:19:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:04,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111130155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:04,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:04,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:04,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228263676] [2022-01-18 14:19:04,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:04,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:04,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:04,132 INFO L87 Difference]: Start difference. First operand 6506 states and 16132 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:04,399 INFO L93 Difference]: Finished difference Result 7055 states and 17180 transitions. [2022-01-18 14:19:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:04,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:04,408 INFO L225 Difference]: With dead ends: 7055 [2022-01-18 14:19:04,408 INFO L226 Difference]: Without dead ends: 7037 [2022-01-18 14:19:04,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:04,408 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 76 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:04,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 227 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2022-01-18 14:19:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 6532. [2022-01-18 14:19:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 6531 states have (on average 2.480324605726535) internal successors, (16199), 6531 states have internal predecessors, (16199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 16199 transitions. [2022-01-18 14:19:04,482 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 16199 transitions. Word has length 47 [2022-01-18 14:19:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:04,482 INFO L470 AbstractCegarLoop]: Abstraction has 6532 states and 16199 transitions. [2022-01-18 14:19:04,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 16199 transitions. [2022-01-18 14:19:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:04,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:04,487 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:04,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 14:19:04,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 14:19:04,688 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1012835979, now seen corresponding path program 62 times [2022-01-18 14:19:04,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:04,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83657147] [2022-01-18 14:19:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:04,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:04,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:04,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83657147] [2022-01-18 14:19:04,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83657147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:04,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084492222] [2022-01-18 14:19:04,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:04,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:04,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:04,776 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:04,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 14:19:04,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:05,026 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:05,026 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 20 treesize of output 19 [2022-01-18 14:19:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:05,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084492222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:05,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:05,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 14:19:05,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667446584] [2022-01-18 14:19:05,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:05,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:19:05,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:19:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:19:05,125 INFO L87 Difference]: Start difference. First operand 6532 states and 16199 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:05,406 INFO L93 Difference]: Finished difference Result 6889 states and 16801 transitions. [2022-01-18 14:19:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:19:05,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:05,416 INFO L225 Difference]: With dead ends: 6889 [2022-01-18 14:19:05,416 INFO L226 Difference]: Without dead ends: 6837 [2022-01-18 14:19:05,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:19:05,416 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:05,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 290 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2022-01-18 14:19:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 6526. [2022-01-18 14:19:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6525 states have (on average 2.478927203065134) internal successors, (16175), 6525 states have internal predecessors, (16175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 16175 transitions. [2022-01-18 14:19:05,489 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 16175 transitions. Word has length 47 [2022-01-18 14:19:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:05,489 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 16175 transitions. [2022-01-18 14:19:05,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 16175 transitions. [2022-01-18 14:19:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:05,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:05,494 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:05,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:05,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 14:19:05,695 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash 595441160, now seen corresponding path program 37 times [2022-01-18 14:19:05,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647112314] [2022-01-18 14:19:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:05,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:05,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647112314] [2022-01-18 14:19:05,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647112314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221226237] [2022-01-18 14:19:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:05,794 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:05,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 14:19:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:19:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:05,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:06,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221226237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:06,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:06,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:19:06,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249323289] [2022-01-18 14:19:06,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:06,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:19:06,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:19:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:06,197 INFO L87 Difference]: Start difference. First operand 6526 states and 16175 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:06,504 INFO L93 Difference]: Finished difference Result 10769 states and 26210 transitions. [2022-01-18 14:19:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:19:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:06,518 INFO L225 Difference]: With dead ends: 10769 [2022-01-18 14:19:06,518 INFO L226 Difference]: Without dead ends: 10769 [2022-01-18 14:19:06,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:19:06,518 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 327 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:06,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 145 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2022-01-18 14:19:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 8006. [2022-01-18 14:19:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8006 states, 8005 states have (on average 2.5630231105559025) internal successors, (20517), 8005 states have internal predecessors, (20517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 20517 transitions. [2022-01-18 14:19:06,635 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 20517 transitions. Word has length 47 [2022-01-18 14:19:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:06,635 INFO L470 AbstractCegarLoop]: Abstraction has 8006 states and 20517 transitions. [2022-01-18 14:19:06,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 20517 transitions. [2022-01-18 14:19:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:06,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:06,642 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:06,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 14:19:06,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 14:19:06,842 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 61575784, now seen corresponding path program 63 times [2022-01-18 14:19:06,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:06,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868765781] [2022-01-18 14:19:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:06,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:06,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868765781] [2022-01-18 14:19:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868765781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294112332] [2022-01-18 14:19:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:06,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:06,922 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:06,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 14:19:06,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:19:06,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:06,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:19:06,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:07,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:07,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294112332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:07,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:07,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-01-18 14:19:07,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325562453] [2022-01-18 14:19:07,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:07,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:07,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:07,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:07,305 INFO L87 Difference]: Start difference. First operand 8006 states and 20517 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:07,598 INFO L93 Difference]: Finished difference Result 9351 states and 23522 transitions. [2022-01-18 14:19:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:19:07,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:07,611 INFO L225 Difference]: With dead ends: 9351 [2022-01-18 14:19:07,611 INFO L226 Difference]: Without dead ends: 9264 [2022-01-18 14:19:07,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:19:07,611 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:07,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 170 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9264 states. [2022-01-18 14:19:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9264 to 8152. [2022-01-18 14:19:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.5668016194331984) internal successors, (20922), 8151 states have internal predecessors, (20922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 20922 transitions. [2022-01-18 14:19:07,721 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 20922 transitions. Word has length 47 [2022-01-18 14:19:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:07,721 INFO L470 AbstractCegarLoop]: Abstraction has 8152 states and 20922 transitions. [2022-01-18 14:19:07,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 20922 transitions. [2022-01-18 14:19:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:07,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:07,729 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:07,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 14:19:07,929 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -243997515, now seen corresponding path program 38 times [2022-01-18 14:19:07,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:07,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082905934] [2022-01-18 14:19:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:07,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:08,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082905934] [2022-01-18 14:19:08,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082905934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604124678] [2022-01-18 14:19:08,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:08,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:08,014 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:08,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 14:19:08,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:08,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:08,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:08,176 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 15 [2022-01-18 14:19:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:08,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604124678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:08,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:08,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:08,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952412197] [2022-01-18 14:19:08,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:08,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:08,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:08,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:08,276 INFO L87 Difference]: Start difference. First operand 8152 states and 20922 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:08,584 INFO L93 Difference]: Finished difference Result 9461 states and 23705 transitions. [2022-01-18 14:19:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:08,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:08,597 INFO L225 Difference]: With dead ends: 9461 [2022-01-18 14:19:08,597 INFO L226 Difference]: Without dead ends: 9418 [2022-01-18 14:19:08,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:08,598 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 172 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:08,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 305 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9418 states. [2022-01-18 14:19:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9418 to 8416. [2022-01-18 14:19:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8416 states, 8415 states have (on average 2.5622103386809267) internal successors, (21561), 8415 states have internal predecessors, (21561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 21561 transitions. [2022-01-18 14:19:08,715 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 21561 transitions. Word has length 47 [2022-01-18 14:19:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 8416 states and 21561 transitions. [2022-01-18 14:19:08,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 21561 transitions. [2022-01-18 14:19:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:08,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:08,723 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:08,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 14:19:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:08,923 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1256335477, now seen corresponding path program 64 times [2022-01-18 14:19:08,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:08,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900179148] [2022-01-18 14:19:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:08,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:09,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:09,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900179148] [2022-01-18 14:19:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900179148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:09,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015510493] [2022-01-18 14:19:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:09,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:09,005 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:09,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 14:19:09,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:09,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:09,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:09,170 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:09,170 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 15 [2022-01-18 14:19:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:09,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015510493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:09,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:09,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-01-18 14:19:09,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355012123] [2022-01-18 14:19:09,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:09,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:09,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:09,272 INFO L87 Difference]: Start difference. First operand 8416 states and 21561 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:09,632 INFO L93 Difference]: Finished difference Result 8989 states and 22650 transitions. [2022-01-18 14:19:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:09,644 INFO L225 Difference]: With dead ends: 8989 [2022-01-18 14:19:09,644 INFO L226 Difference]: Without dead ends: 8939 [2022-01-18 14:19:09,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:09,644 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 98 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:09,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 307 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8939 states. [2022-01-18 14:19:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8939 to 8383. [2022-01-18 14:19:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8383 states, 8382 states have (on average 2.5600095442615127) internal successors, (21458), 8382 states have internal predecessors, (21458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8383 states to 8383 states and 21458 transitions. [2022-01-18 14:19:09,806 INFO L78 Accepts]: Start accepts. Automaton has 8383 states and 21458 transitions. Word has length 47 [2022-01-18 14:19:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:09,806 INFO L470 AbstractCegarLoop]: Abstraction has 8383 states and 21458 transitions. [2022-01-18 14:19:09,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 8383 states and 21458 transitions. [2022-01-18 14:19:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:09,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:09,813 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:09,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:10,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 14:19:10,013 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:10,014 INFO L85 PathProgramCache]: Analyzing trace with hash 642799297, now seen corresponding path program 65 times [2022-01-18 14:19:10,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:10,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495840533] [2022-01-18 14:19:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:10,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:10,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:10,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495840533] [2022-01-18 14:19:10,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495840533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:10,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11846302] [2022-01-18 14:19:10,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:10,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:10,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:10,097 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:10,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 14:19:10,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:19:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:10,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:10,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:10,252 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 15 [2022-01-18 14:19:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:10,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11846302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:10,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:10,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:10,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361792108] [2022-01-18 14:19:10,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:10,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:10,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:10,352 INFO L87 Difference]: Start difference. First operand 8383 states and 21458 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:10,665 INFO L93 Difference]: Finished difference Result 9243 states and 23204 transitions. [2022-01-18 14:19:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:10,676 INFO L225 Difference]: With dead ends: 9243 [2022-01-18 14:19:10,677 INFO L226 Difference]: Without dead ends: 9207 [2022-01-18 14:19:10,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:10,677 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 119 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:10,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 300 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9207 states. [2022-01-18 14:19:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9207 to 8367. [2022-01-18 14:19:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8367 states, 8366 states have (on average 2.560482907004542) internal successors, (21421), 8366 states have internal predecessors, (21421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 21421 transitions. [2022-01-18 14:19:10,792 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 21421 transitions. Word has length 47 [2022-01-18 14:19:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:10,792 INFO L470 AbstractCegarLoop]: Abstraction has 8367 states and 21421 transitions. [2022-01-18 14:19:10,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 21421 transitions. [2022-01-18 14:19:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:10,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:10,806 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:10,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:11,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:11,027 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1510250665, now seen corresponding path program 66 times [2022-01-18 14:19:11,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:11,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670027069] [2022-01-18 14:19:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:11,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:11,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670027069] [2022-01-18 14:19:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670027069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987121877] [2022-01-18 14:19:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:11,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:11,111 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:11,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 14:19:11,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 14:19:11,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:11,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:19:11,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:11,396 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:19:11,396 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 16 [2022-01-18 14:19:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:11,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:11,588 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:11,589 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 15 [2022-01-18 14:19:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987121877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:11,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:11,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 25 [2022-01-18 14:19:11,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830758924] [2022-01-18 14:19:11,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:11,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 14:19:11,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 14:19:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:19:11,734 INFO L87 Difference]: Start difference. First operand 8367 states and 21421 transitions. Second operand has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:16,069 INFO L93 Difference]: Finished difference Result 17429 states and 45611 transitions. [2022-01-18 14:19:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-18 14:19:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:16,101 INFO L225 Difference]: With dead ends: 17429 [2022-01-18 14:19:16,101 INFO L226 Difference]: Without dead ends: 17408 [2022-01-18 14:19:16,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 177 SyntacticMatches, 29 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17089 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6134, Invalid=29398, Unknown=0, NotChecked=0, Total=35532 [2022-01-18 14:19:16,104 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 448 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:16,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 528 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1546 Invalid, 0 Unknown, 1124 Unchecked, 0.6s Time] [2022-01-18 14:19:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2022-01-18 14:19:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 9303. [2022-01-18 14:19:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 2.619759191571705) internal successors, (24369), 9302 states have internal predecessors, (24369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 24369 transitions. [2022-01-18 14:19:16,281 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 24369 transitions. Word has length 47 [2022-01-18 14:19:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:16,281 INFO L470 AbstractCegarLoop]: Abstraction has 9303 states and 24369 transitions. [2022-01-18 14:19:16,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 24369 transitions. [2022-01-18 14:19:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:16,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:16,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:16,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:16,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:16,507 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1200020823, now seen corresponding path program 67 times [2022-01-18 14:19:16,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:16,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196353961] [2022-01-18 14:19:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:16,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:16,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:16,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196353961] [2022-01-18 14:19:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196353961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:16,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651546493] [2022-01-18 14:19:16,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:16,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:16,590 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:16,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 14:19:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:16,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:16,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:16,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:16,761 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:16,762 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 20 treesize of output 19 [2022-01-18 14:19:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:16,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651546493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:16,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:16,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:19:16,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769044952] [2022-01-18 14:19:16,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:16,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:19:16,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:19:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:19:16,860 INFO L87 Difference]: Start difference. First operand 9303 states and 24369 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:17,276 INFO L93 Difference]: Finished difference Result 10692 states and 27212 transitions. [2022-01-18 14:19:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:19:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:17,291 INFO L225 Difference]: With dead ends: 10692 [2022-01-18 14:19:17,291 INFO L226 Difference]: Without dead ends: 10692 [2022-01-18 14:19:17,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:19:17,291 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:17,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 390 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10692 states. [2022-01-18 14:19:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10692 to 9321. [2022-01-18 14:19:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9321 states, 9320 states have (on average 2.620708154506438) internal successors, (24425), 9320 states have internal predecessors, (24425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9321 states to 9321 states and 24425 transitions. [2022-01-18 14:19:17,442 INFO L78 Accepts]: Start accepts. Automaton has 9321 states and 24425 transitions. Word has length 47 [2022-01-18 14:19:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:17,442 INFO L470 AbstractCegarLoop]: Abstraction has 9321 states and 24425 transitions. [2022-01-18 14:19:17,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9321 states and 24425 transitions. [2022-01-18 14:19:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:17,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:17,450 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:17,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 14:19:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:17,650 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1071762469, now seen corresponding path program 39 times [2022-01-18 14:19:17,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:17,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107053179] [2022-01-18 14:19:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:17,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:17,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107053179] [2022-01-18 14:19:17,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107053179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129508196] [2022-01-18 14:19:17,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:17,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:17,747 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:17,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 14:19:17,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:19:17,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 14:19:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:19,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:19:21,668 INFO L353 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2022-01-18 14:19:21,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 37 [2022-01-18 14:19:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 14:19:21,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129508196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:21,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:21,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 22, 16] total 44 [2022-01-18 14:19:21,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761795120] [2022-01-18 14:19:21,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:21,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 14:19:21,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 14:19:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1559, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 14:19:21,729 INFO L87 Difference]: Start difference. First operand 9321 states and 24425 transitions. Second operand has 45 states, 45 states have (on average 2.6) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:27,212 INFO L93 Difference]: Finished difference Result 29076 states and 75743 transitions. [2022-01-18 14:19:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-18 14:19:27,213 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:27,262 INFO L225 Difference]: With dead ends: 29076 [2022-01-18 14:19:27,262 INFO L226 Difference]: Without dead ends: 29064 [2022-01-18 14:19:27,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 132 SyntacticMatches, 61 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13174 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4567, Invalid=20873, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 14:19:27,263 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 339 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2863 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:27,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 94 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 451 Invalid, 0 Unknown, 2863 Unchecked, 0.2s Time] [2022-01-18 14:19:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29064 states. [2022-01-18 14:19:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29064 to 20521. [2022-01-18 14:19:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20521 states, 20520 states have (on average 2.619103313840156) internal successors, (53744), 20520 states have internal predecessors, (53744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20521 states to 20521 states and 53744 transitions. [2022-01-18 14:19:27,701 INFO L78 Accepts]: Start accepts. Automaton has 20521 states and 53744 transitions. Word has length 47 [2022-01-18 14:19:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:27,701 INFO L470 AbstractCegarLoop]: Abstraction has 20521 states and 53744 transitions. [2022-01-18 14:19:27,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 20521 states and 53744 transitions. [2022-01-18 14:19:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:27,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:27,720 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:27,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 14:19:27,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:27,921 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash 428570523, now seen corresponding path program 68 times [2022-01-18 14:19:27,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:27,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063555317] [2022-01-18 14:19:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:27,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:28,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:28,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063555317] [2022-01-18 14:19:28,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063555317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:28,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886411972] [2022-01-18 14:19:28,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:28,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:28,057 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:28,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 14:19:28,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:28,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:28,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:28,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:28,221 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:28,221 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 15 [2022-01-18 14:19:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886411972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:28,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:28,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-01-18 14:19:28,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524203508] [2022-01-18 14:19:28,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:28,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:28,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:28,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:28,321 INFO L87 Difference]: Start difference. First operand 20521 states and 53744 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:28,758 INFO L93 Difference]: Finished difference Result 21402 states and 55478 transitions. [2022-01-18 14:19:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:28,793 INFO L225 Difference]: With dead ends: 21402 [2022-01-18 14:19:28,793 INFO L226 Difference]: Without dead ends: 21334 [2022-01-18 14:19:28,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:28,794 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 96 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:28,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 373 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21334 states. [2022-01-18 14:19:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21334 to 20578. [2022-01-18 14:19:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20578 states, 20577 states have (on average 2.6089809010059777) internal successors, (53685), 20577 states have internal predecessors, (53685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20578 states to 20578 states and 53685 transitions. [2022-01-18 14:19:29,134 INFO L78 Accepts]: Start accepts. Automaton has 20578 states and 53685 transitions. Word has length 47 [2022-01-18 14:19:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 20578 states and 53685 transitions. [2022-01-18 14:19:29,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 20578 states and 53685 transitions. [2022-01-18 14:19:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:29,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:29,152 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:29,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 14:19:29,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:29,352 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash -184965657, now seen corresponding path program 69 times [2022-01-18 14:19:29,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:29,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559830400] [2022-01-18 14:19:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:29,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:29,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559830400] [2022-01-18 14:19:29,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559830400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:29,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176167829] [2022-01-18 14:19:29,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:29,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:29,436 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:29,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 14:19:29,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:19:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:29,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:29,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:29,587 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:29,587 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 15 [2022-01-18 14:19:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:29,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176167829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:29,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:29,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:29,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208156237] [2022-01-18 14:19:29,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:29,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:29,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:29,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:29,686 INFO L87 Difference]: Start difference. First operand 20578 states and 53685 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:30,056 INFO L93 Difference]: Finished difference Result 22274 states and 57228 transitions. [2022-01-18 14:19:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:30,171 INFO L225 Difference]: With dead ends: 22274 [2022-01-18 14:19:30,171 INFO L226 Difference]: Without dead ends: 22226 [2022-01-18 14:19:30,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:30,171 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:30,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 323 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22226 states. [2022-01-18 14:19:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22226 to 20541. [2022-01-18 14:19:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20541 states, 20540 states have (on average 2.6070107108081793) internal successors, (53548), 20540 states have internal predecessors, (53548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20541 states to 20541 states and 53548 transitions. [2022-01-18 14:19:30,464 INFO L78 Accepts]: Start accepts. Automaton has 20541 states and 53548 transitions. Word has length 47 [2022-01-18 14:19:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:30,464 INFO L470 AbstractCegarLoop]: Abstraction has 20541 states and 53548 transitions. [2022-01-18 14:19:30,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 20541 states and 53548 transitions. [2022-01-18 14:19:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:30,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:30,485 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:30,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 14:19:30,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 14:19:30,691 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:30,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1833323160, now seen corresponding path program 70 times [2022-01-18 14:19:30,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:30,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013067357] [2022-01-18 14:19:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:30,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:30,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:30,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013067357] [2022-01-18 14:19:30,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013067357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:30,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740750129] [2022-01-18 14:19:30,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:30,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:30,764 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 14:19:30,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:19:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:30,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740750129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:31,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:31,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-01-18 14:19:31,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148698344] [2022-01-18 14:19:31,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:31,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:31,122 INFO L87 Difference]: Start difference. First operand 20541 states and 53548 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:31,420 INFO L93 Difference]: Finished difference Result 24380 states and 63412 transitions. [2022-01-18 14:19:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:19:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:31,459 INFO L225 Difference]: With dead ends: 24380 [2022-01-18 14:19:31,459 INFO L226 Difference]: Without dead ends: 24296 [2022-01-18 14:19:31,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:19:31,460 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:31,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 157 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24296 states. [2022-01-18 14:19:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24296 to 22505. [2022-01-18 14:19:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22505 states, 22504 states have (on average 2.6204674724493424) internal successors, (58971), 22504 states have internal predecessors, (58971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22505 states to 22505 states and 58971 transitions. [2022-01-18 14:19:31,910 INFO L78 Accepts]: Start accepts. Automaton has 22505 states and 58971 transitions. Word has length 47 [2022-01-18 14:19:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:31,910 INFO L470 AbstractCegarLoop]: Abstraction has 22505 states and 58971 transitions. [2022-01-18 14:19:31,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 22505 states and 58971 transitions. [2022-01-18 14:19:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:31,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:31,932 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:31,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:32,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 14:19:32,147 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash -309643651, now seen corresponding path program 71 times [2022-01-18 14:19:32,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299206054] [2022-01-18 14:19:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:32,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:32,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299206054] [2022-01-18 14:19:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299206054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469064818] [2022-01-18 14:19:32,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:32,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:32,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:32,231 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:32,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 14:19:32,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:19:32,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:32,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:32,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:32,401 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:32,402 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 20 treesize of output 19 [2022-01-18 14:19:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:32,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469064818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:32,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:32,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:19:32,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887983537] [2022-01-18 14:19:32,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:32,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:19:32,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:19:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:19:32,499 INFO L87 Difference]: Start difference. First operand 22505 states and 58971 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:33,020 INFO L93 Difference]: Finished difference Result 25523 states and 65523 transitions. [2022-01-18 14:19:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:19:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:33,062 INFO L225 Difference]: With dead ends: 25523 [2022-01-18 14:19:33,062 INFO L226 Difference]: Without dead ends: 25481 [2022-01-18 14:19:33,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:19:33,062 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 220 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:33,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 436 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2022-01-18 14:19:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 22399. [2022-01-18 14:19:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22399 states, 22398 states have (on average 2.616974729886597) internal successors, (58615), 22398 states have internal predecessors, (58615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22399 states to 22399 states and 58615 transitions. [2022-01-18 14:19:33,523 INFO L78 Accepts]: Start accepts. Automaton has 22399 states and 58615 transitions. Word has length 47 [2022-01-18 14:19:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:33,523 INFO L470 AbstractCegarLoop]: Abstraction has 22399 states and 58615 transitions. [2022-01-18 14:19:33,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 22399 states and 58615 transitions. [2022-01-18 14:19:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:33,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:33,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:33,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 14:19:33,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 14:19:33,743 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2111788211, now seen corresponding path program 72 times [2022-01-18 14:19:33,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:33,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257726780] [2022-01-18 14:19:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:33,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:33,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257726780] [2022-01-18 14:19:33,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257726780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423767873] [2022-01-18 14:19:33,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:33,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:33,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:33,830 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:33,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 14:19:33,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 14:19:33,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:33,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:34,004 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:34,004 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 20 treesize of output 19 [2022-01-18 14:19:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:34,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423767873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:34,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:34,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:19:34,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677800072] [2022-01-18 14:19:34,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:34,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:19:34,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:19:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:19:34,093 INFO L87 Difference]: Start difference. First operand 22399 states and 58615 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:34,581 INFO L93 Difference]: Finished difference Result 25240 states and 64837 transitions. [2022-01-18 14:19:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:19:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:34,623 INFO L225 Difference]: With dead ends: 25240 [2022-01-18 14:19:34,624 INFO L226 Difference]: Without dead ends: 25180 [2022-01-18 14:19:34,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:19:34,624 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 183 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:34,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 406 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25180 states. [2022-01-18 14:19:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25180 to 22581. [2022-01-18 14:19:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22581 states, 22580 states have (on average 2.6141718334809565) internal successors, (59028), 22580 states have internal predecessors, (59028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22581 states to 22581 states and 59028 transitions. [2022-01-18 14:19:35,118 INFO L78 Accepts]: Start accepts. Automaton has 22581 states and 59028 transitions. Word has length 47 [2022-01-18 14:19:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 22581 states and 59028 transitions. [2022-01-18 14:19:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 22581 states and 59028 transitions. [2022-01-18 14:19:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:35,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:35,135 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:35,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:35,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 14:19:35,335 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2075721336, now seen corresponding path program 40 times [2022-01-18 14:19:35,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810559507] [2022-01-18 14:19:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:35,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:35,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810559507] [2022-01-18 14:19:35,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810559507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954228730] [2022-01-18 14:19:35,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:35,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:35,434 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:35,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 14:19:35,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:19:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:35,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954228730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:35,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:35,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-01-18 14:19:35,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808192881] [2022-01-18 14:19:35,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:35,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:19:35,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:19:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:19:35,839 INFO L87 Difference]: Start difference. First operand 22581 states and 59028 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:36,281 INFO L93 Difference]: Finished difference Result 26295 states and 67598 transitions. [2022-01-18 14:19:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:19:36,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:36,326 INFO L225 Difference]: With dead ends: 26295 [2022-01-18 14:19:36,326 INFO L226 Difference]: Without dead ends: 26295 [2022-01-18 14:19:36,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:19:36,326 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 356 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:36,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 173 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26295 states. [2022-01-18 14:19:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26295 to 23107. [2022-01-18 14:19:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23107 states, 23106 states have (on average 2.618583917597161) internal successors, (60505), 23106 states have internal predecessors, (60505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23107 states to 23107 states and 60505 transitions. [2022-01-18 14:19:36,736 INFO L78 Accepts]: Start accepts. Automaton has 23107 states and 60505 transitions. Word has length 47 [2022-01-18 14:19:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:36,736 INFO L470 AbstractCegarLoop]: Abstraction has 23107 states and 60505 transitions. [2022-01-18 14:19:36,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 23107 states and 60505 transitions. [2022-01-18 14:19:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:36,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:36,754 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:36,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-01-18 14:19:36,955 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1796576408, now seen corresponding path program 73 times [2022-01-18 14:19:36,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904980344] [2022-01-18 14:19:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:36,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:37,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904980344] [2022-01-18 14:19:37,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904980344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888953952] [2022-01-18 14:19:37,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:37,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:37,109 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:37,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 14:19:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:37,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:19:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:37,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:37,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888953952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:37,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:37,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-01-18 14:19:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570417221] [2022-01-18 14:19:37,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:37,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:19:37,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:19:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:37,470 INFO L87 Difference]: Start difference. First operand 23107 states and 60505 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:37,777 INFO L93 Difference]: Finished difference Result 24544 states and 63385 transitions. [2022-01-18 14:19:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:19:37,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:37,814 INFO L225 Difference]: With dead ends: 24544 [2022-01-18 14:19:37,814 INFO L226 Difference]: Without dead ends: 24457 [2022-01-18 14:19:37,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:19:37,815 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 201 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:37,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 137 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24457 states. [2022-01-18 14:19:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24457 to 23077. [2022-01-18 14:19:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23077 states, 23076 states have (on average 2.612237822846247) internal successors, (60280), 23076 states have internal predecessors, (60280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23077 states to 23077 states and 60280 transitions. [2022-01-18 14:19:38,209 INFO L78 Accepts]: Start accepts. Automaton has 23077 states and 60280 transitions. Word has length 47 [2022-01-18 14:19:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:38,210 INFO L470 AbstractCegarLoop]: Abstraction has 23077 states and 60280 transitions. [2022-01-18 14:19:38,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23077 states and 60280 transitions. [2022-01-18 14:19:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:38,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:38,227 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:38,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:38,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:38,428 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 303161907, now seen corresponding path program 41 times [2022-01-18 14:19:38,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:38,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607515250] [2022-01-18 14:19:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:38,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:19:38,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607515250] [2022-01-18 14:19:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607515250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425923337] [2022-01-18 14:19:38,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:38,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:38,513 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:38,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 14:19:38,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:19:38,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:19:38,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:38,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:38,724 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 15 [2022-01-18 14:19:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:19:38,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425923337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:38,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:38,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:38,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524366807] [2022-01-18 14:19:38,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:38,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:38,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:38,841 INFO L87 Difference]: Start difference. First operand 23077 states and 60280 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:39,186 INFO L93 Difference]: Finished difference Result 24261 states and 62845 transitions. [2022-01-18 14:19:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:39,227 INFO L225 Difference]: With dead ends: 24261 [2022-01-18 14:19:39,228 INFO L226 Difference]: Without dead ends: 24257 [2022-01-18 14:19:39,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:39,228 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:39,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 297 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:19:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2022-01-18 14:19:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 23090. [2022-01-18 14:19:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23090 states, 23089 states have (on average 2.6126293906189093) internal successors, (60323), 23089 states have internal predecessors, (60323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23090 states to 23090 states and 60323 transitions. [2022-01-18 14:19:39,665 INFO L78 Accepts]: Start accepts. Automaton has 23090 states and 60323 transitions. Word has length 47 [2022-01-18 14:19:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:39,665 INFO L470 AbstractCegarLoop]: Abstraction has 23090 states and 60323 transitions. [2022-01-18 14:19:39,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23090 states and 60323 transitions. [2022-01-18 14:19:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:39,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:39,682 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:39,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:39,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:39,883 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 62826139, now seen corresponding path program 42 times [2022-01-18 14:19:39,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:39,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370286380] [2022-01-18 14:19:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:39,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:39,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:39,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370286380] [2022-01-18 14:19:39,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370286380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:39,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003324291] [2022-01-18 14:19:39,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:39,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:39,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:39,966 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:39,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 14:19:39,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 14:19:39,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:40,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:40,125 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:40,125 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 15 [2022-01-18 14:19:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:40,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003324291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:40,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:40,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:40,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210501522] [2022-01-18 14:19:40,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:40,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:40,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:40,220 INFO L87 Difference]: Start difference. First operand 23090 states and 60323 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:40,614 INFO L93 Difference]: Finished difference Result 24581 states and 63575 transitions. [2022-01-18 14:19:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:40,651 INFO L225 Difference]: With dead ends: 24581 [2022-01-18 14:19:40,651 INFO L226 Difference]: Without dead ends: 24554 [2022-01-18 14:19:40,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:40,652 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 146 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:40,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 353 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24554 states. [2022-01-18 14:19:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24554 to 23208. [2022-01-18 14:19:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23208 states, 23207 states have (on average 2.6111948980910933) internal successors, (60598), 23207 states have internal predecessors, (60598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23208 states to 23208 states and 60598 transitions. [2022-01-18 14:19:41,163 INFO L78 Accepts]: Start accepts. Automaton has 23208 states and 60598 transitions. Word has length 47 [2022-01-18 14:19:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:41,164 INFO L470 AbstractCegarLoop]: Abstraction has 23208 states and 60598 transitions. [2022-01-18 14:19:41,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 23208 states and 60598 transitions. [2022-01-18 14:19:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:41,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:41,181 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:41,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 14:19:41,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:41,381 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2109927755, now seen corresponding path program 74 times [2022-01-18 14:19:41,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:41,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798672821] [2022-01-18 14:19:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:41,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:41,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:41,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798672821] [2022-01-18 14:19:41,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798672821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:41,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800088481] [2022-01-18 14:19:41,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:41,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:41,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:41,470 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 14:19:41,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:41,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:41,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:41,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:41,631 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:41,631 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 15 [2022-01-18 14:19:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:41,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800088481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:41,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:41,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-01-18 14:19:41,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555911100] [2022-01-18 14:19:41,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:41,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:41,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:41,732 INFO L87 Difference]: Start difference. First operand 23208 states and 60598 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:42,203 INFO L93 Difference]: Finished difference Result 24015 states and 62171 transitions. [2022-01-18 14:19:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:42,239 INFO L225 Difference]: With dead ends: 24015 [2022-01-18 14:19:42,239 INFO L226 Difference]: Without dead ends: 23929 [2022-01-18 14:19:42,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:42,240 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 102 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:42,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 374 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23929 states. [2022-01-18 14:19:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23929 to 23114. [2022-01-18 14:19:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23114 states, 23113 states have (on average 2.6092675117899016) internal successors, (60308), 23113 states have internal predecessors, (60308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23114 states to 23114 states and 60308 transitions. [2022-01-18 14:19:42,632 INFO L78 Accepts]: Start accepts. Automaton has 23114 states and 60308 transitions. Word has length 47 [2022-01-18 14:19:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:42,632 INFO L470 AbstractCegarLoop]: Abstraction has 23114 states and 60308 transitions. [2022-01-18 14:19:42,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 23114 states and 60308 transitions. [2022-01-18 14:19:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:42,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:42,651 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:42,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 14:19:42,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:42,851 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1571503361, now seen corresponding path program 75 times [2022-01-18 14:19:42,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899609858] [2022-01-18 14:19:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:42,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:42,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899609858] [2022-01-18 14:19:42,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899609858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678246857] [2022-01-18 14:19:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:42,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:42,943 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:42,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 14:19:42,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-18 14:19:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:42,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:43,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:43,125 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:43,125 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 15 [2022-01-18 14:19:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678246857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:43,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:43,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:43,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421872300] [2022-01-18 14:19:43,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:43,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:43,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:43,230 INFO L87 Difference]: Start difference. First operand 23114 states and 60308 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:43,706 INFO L93 Difference]: Finished difference Result 24611 states and 63415 transitions. [2022-01-18 14:19:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:43,742 INFO L225 Difference]: With dead ends: 24611 [2022-01-18 14:19:43,742 INFO L226 Difference]: Without dead ends: 24551 [2022-01-18 14:19:43,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:43,743 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 138 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:43,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 389 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24551 states. [2022-01-18 14:19:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24551 to 23030. [2022-01-18 14:19:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 2.6088410265317643) internal successors, (60079), 23029 states have internal predecessors, (60079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 60079 transitions. [2022-01-18 14:19:44,210 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 60079 transitions. Word has length 47 [2022-01-18 14:19:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:44,210 INFO L470 AbstractCegarLoop]: Abstraction has 23030 states and 60079 transitions. [2022-01-18 14:19:44,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 60079 transitions. [2022-01-18 14:19:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:44,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:44,229 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:44,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:44,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2022-01-18 14:19:44,430 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash -581546601, now seen corresponding path program 76 times [2022-01-18 14:19:44,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445687245] [2022-01-18 14:19:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:44,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:44,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445687245] [2022-01-18 14:19:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445687245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488581846] [2022-01-18 14:19:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:44,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:44,543 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:44,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 14:19:44,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:44,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:44,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:44,717 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:44,717 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 20 treesize of output 19 [2022-01-18 14:19:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:44,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488581846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:44,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:44,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:19:44,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745951941] [2022-01-18 14:19:44,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:44,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:19:44,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:19:44,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:19:44,812 INFO L87 Difference]: Start difference. First operand 23030 states and 60079 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:45,337 INFO L93 Difference]: Finished difference Result 26832 states and 68474 transitions. [2022-01-18 14:19:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:19:45,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:45,378 INFO L225 Difference]: With dead ends: 26832 [2022-01-18 14:19:45,379 INFO L226 Difference]: Without dead ends: 26778 [2022-01-18 14:19:45,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:19:45,379 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 252 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:45,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 474 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2022-01-18 14:19:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 23298. [2022-01-18 14:19:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23298 states, 23297 states have (on average 2.6057861527235264) internal successors, (60707), 23297 states have internal predecessors, (60707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23298 states to 23298 states and 60707 transitions. [2022-01-18 14:19:45,756 INFO L78 Accepts]: Start accepts. Automaton has 23298 states and 60707 transitions. Word has length 47 [2022-01-18 14:19:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:45,756 INFO L470 AbstractCegarLoop]: Abstraction has 23298 states and 60707 transitions. [2022-01-18 14:19:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23298 states and 60707 transitions. [2022-01-18 14:19:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:45,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:45,773 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:45,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-18 14:19:45,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:45,974 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:45,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash -426710067, now seen corresponding path program 77 times [2022-01-18 14:19:45,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:45,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581909483] [2022-01-18 14:19:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:45,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:46,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581909483] [2022-01-18 14:19:46,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581909483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240038611] [2022-01-18 14:19:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:46,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:46,077 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:46,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 14:19:46,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 14:19:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:46,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:46,246 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:46,246 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 20 treesize of output 19 [2022-01-18 14:19:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240038611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:46,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:46,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:19:46,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868368439] [2022-01-18 14:19:46,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:46,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:19:46,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:19:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:19:46,393 INFO L87 Difference]: Start difference. First operand 23298 states and 60707 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:47,039 INFO L93 Difference]: Finished difference Result 29848 states and 75292 transitions. [2022-01-18 14:19:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:19:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:47,086 INFO L225 Difference]: With dead ends: 29848 [2022-01-18 14:19:47,086 INFO L226 Difference]: Without dead ends: 29494 [2022-01-18 14:19:47,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:19:47,087 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 451 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:47,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 472 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29494 states. [2022-01-18 14:19:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29494 to 23163. [2022-01-18 14:19:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23163 states, 23162 states have (on average 2.6059062257145325) internal successors, (60358), 23162 states have internal predecessors, (60358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23163 states to 23163 states and 60358 transitions. [2022-01-18 14:19:47,495 INFO L78 Accepts]: Start accepts. Automaton has 23163 states and 60358 transitions. Word has length 47 [2022-01-18 14:19:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:47,495 INFO L470 AbstractCegarLoop]: Abstraction has 23163 states and 60358 transitions. [2022-01-18 14:19:47,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23163 states and 60358 transitions. [2022-01-18 14:19:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:47,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:47,512 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:47,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 14:19:47,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:47,713 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:47,713 INFO L85 PathProgramCache]: Analyzing trace with hash -486401577, now seen corresponding path program 78 times [2022-01-18 14:19:47,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:47,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478464147] [2022-01-18 14:19:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:47,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:47,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478464147] [2022-01-18 14:19:47,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478464147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507849671] [2022-01-18 14:19:47,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:47,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:47,810 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:47,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 14:19:47,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 14:19:47,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:47,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:47,995 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:47,995 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 20 treesize of output 19 [2022-01-18 14:19:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:48,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507849671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:48,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:48,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:19:48,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451988976] [2022-01-18 14:19:48,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:48,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:48,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:48,090 INFO L87 Difference]: Start difference. First operand 23163 states and 60358 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:48,608 INFO L93 Difference]: Finished difference Result 27805 states and 70492 transitions. [2022-01-18 14:19:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:19:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:48,652 INFO L225 Difference]: With dead ends: 27805 [2022-01-18 14:19:48,653 INFO L226 Difference]: Without dead ends: 27427 [2022-01-18 14:19:48,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:19:48,653 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 252 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:48,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 415 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27427 states. [2022-01-18 14:19:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27427 to 22650. [2022-01-18 14:19:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22650 states, 22649 states have (on average 2.60660514813016) internal successors, (59037), 22649 states have internal predecessors, (59037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22650 states to 22650 states and 59037 transitions. [2022-01-18 14:19:49,184 INFO L78 Accepts]: Start accepts. Automaton has 22650 states and 59037 transitions. Word has length 47 [2022-01-18 14:19:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:49,185 INFO L470 AbstractCegarLoop]: Abstraction has 22650 states and 59037 transitions. [2022-01-18 14:19:49,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22650 states and 59037 transitions. [2022-01-18 14:19:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:49,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:49,201 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:49,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:49,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 14:19:49,402 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:49,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1444774209, now seen corresponding path program 43 times [2022-01-18 14:19:49,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:49,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894682777] [2022-01-18 14:19:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:49,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:49,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:49,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894682777] [2022-01-18 14:19:49,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894682777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86938684] [2022-01-18 14:19:49,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:49,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:49,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:49,490 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:49,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 14:19:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:49,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:49,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:49,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:49,643 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:49,643 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 15 [2022-01-18 14:19:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:49,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86938684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:49,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:49,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:49,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267639614] [2022-01-18 14:19:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:49,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:49,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:49,749 INFO L87 Difference]: Start difference. First operand 22650 states and 59037 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:50,116 INFO L93 Difference]: Finished difference Result 23580 states and 61068 transitions. [2022-01-18 14:19:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:50,152 INFO L225 Difference]: With dead ends: 23580 [2022-01-18 14:19:50,152 INFO L226 Difference]: Without dead ends: 23576 [2022-01-18 14:19:50,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:50,153 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:50,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 305 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23576 states. [2022-01-18 14:19:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23576 to 22522. [2022-01-18 14:19:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 2.607166644465166) internal successors, (58716), 22521 states have internal predecessors, (58716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 58716 transitions. [2022-01-18 14:19:50,503 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 58716 transitions. Word has length 47 [2022-01-18 14:19:50,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 22522 states and 58716 transitions. [2022-01-18 14:19:50,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 58716 transitions. [2022-01-18 14:19:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:50,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:50,520 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:50,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 14:19:50,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 14:19:50,721 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1341515865, now seen corresponding path program 79 times [2022-01-18 14:19:50,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:50,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156767690] [2022-01-18 14:19:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:50,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:50,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156767690] [2022-01-18 14:19:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156767690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580612509] [2022-01-18 14:19:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:19:50,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:50,809 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:50,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 14:19:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:50,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:50,964 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:19:50,964 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 15 [2022-01-18 14:19:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:19:51,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580612509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:51,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:51,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:19:51,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185219277] [2022-01-18 14:19:51,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:51,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:19:51,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:19:51,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:19:51,065 INFO L87 Difference]: Start difference. First operand 22522 states and 58716 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:51,437 INFO L93 Difference]: Finished difference Result 23865 states and 61494 transitions. [2022-01-18 14:19:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:19:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:51,473 INFO L225 Difference]: With dead ends: 23865 [2022-01-18 14:19:51,473 INFO L226 Difference]: Without dead ends: 23811 [2022-01-18 14:19:51,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:19:51,474 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 149 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:51,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 359 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23811 states. [2022-01-18 14:19:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23811 to 22530. [2022-01-18 14:19:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22530 states, 22529 states have (on average 2.606906653646411) internal successors, (58731), 22529 states have internal predecessors, (58731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22530 states to 22530 states and 58731 transitions. [2022-01-18 14:19:51,934 INFO L78 Accepts]: Start accepts. Automaton has 22530 states and 58731 transitions. Word has length 47 [2022-01-18 14:19:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:51,934 INFO L470 AbstractCegarLoop]: Abstraction has 22530 states and 58731 transitions. [2022-01-18 14:19:51,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 22530 states and 58731 transitions. [2022-01-18 14:19:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:51,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:51,952 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:51,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-01-18 14:19:52,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 14:19:52,153 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash 800401469, now seen corresponding path program 80 times [2022-01-18 14:19:52,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299617566] [2022-01-18 14:19:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:52,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:52,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299617566] [2022-01-18 14:19:52,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299617566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053646500] [2022-01-18 14:19:52,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:19:52,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:52,257 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:52,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 14:19:52,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:19:52,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:52,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:52,426 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:52,426 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 20 treesize of output 19 [2022-01-18 14:19:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:52,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053646500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:52,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:52,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:19:52,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251170943] [2022-01-18 14:19:52,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:52,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:19:52,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:19:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:19:52,521 INFO L87 Difference]: Start difference. First operand 22530 states and 58731 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:53,056 INFO L93 Difference]: Finished difference Result 25620 states and 65419 transitions. [2022-01-18 14:19:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:19:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:53,103 INFO L225 Difference]: With dead ends: 25620 [2022-01-18 14:19:53,103 INFO L226 Difference]: Without dead ends: 25566 [2022-01-18 14:19:53,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:19:53,103 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 268 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:53,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 477 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:19:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25566 states. [2022-01-18 14:19:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25566 to 22724. [2022-01-18 14:19:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22724 states, 22723 states have (on average 2.6042335959160323) internal successors, (59176), 22723 states have internal predecessors, (59176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22724 states to 22724 states and 59176 transitions. [2022-01-18 14:19:53,467 INFO L78 Accepts]: Start accepts. Automaton has 22724 states and 59176 transitions. Word has length 47 [2022-01-18 14:19:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:53,467 INFO L470 AbstractCegarLoop]: Abstraction has 22724 states and 59176 transitions. [2022-01-18 14:19:53,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 22724 states and 59176 transitions. [2022-01-18 14:19:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:53,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:53,483 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:53,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 14:19:53,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:53,684 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 955238003, now seen corresponding path program 81 times [2022-01-18 14:19:53,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26201274] [2022-01-18 14:19:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:53,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:53,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26201274] [2022-01-18 14:19:53,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26201274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251913504] [2022-01-18 14:19:53,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:19:53,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:53,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:53,777 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:53,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 14:19:53,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 14:19:53,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:53,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:53,948 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:53,948 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 20 treesize of output 19 [2022-01-18 14:19:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:54,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251913504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:54,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:54,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:19:54,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624622735] [2022-01-18 14:19:54,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:54,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:19:54,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:19:54,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:19:54,037 INFO L87 Difference]: Start difference. First operand 22724 states and 59176 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:54,769 INFO L93 Difference]: Finished difference Result 28648 states and 71941 transitions. [2022-01-18 14:19:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 14:19:54,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:54,814 INFO L225 Difference]: With dead ends: 28648 [2022-01-18 14:19:54,814 INFO L226 Difference]: Without dead ends: 28324 [2022-01-18 14:19:54,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:19:54,814 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 562 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:54,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 544 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28324 states. [2022-01-18 14:19:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28324 to 22394. [2022-01-18 14:19:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22394 states, 22393 states have (on average 2.603045594605457) internal successors, (58290), 22393 states have internal predecessors, (58290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22394 states to 22394 states and 58290 transitions. [2022-01-18 14:19:55,325 INFO L78 Accepts]: Start accepts. Automaton has 22394 states and 58290 transitions. Word has length 47 [2022-01-18 14:19:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:55,325 INFO L470 AbstractCegarLoop]: Abstraction has 22394 states and 58290 transitions. [2022-01-18 14:19:55,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22394 states and 58290 transitions. [2022-01-18 14:19:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:55,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:55,343 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:55,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 14:19:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-01-18 14:19:55,544 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 895546493, now seen corresponding path program 82 times [2022-01-18 14:19:55,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795995861] [2022-01-18 14:19:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:55,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795995861] [2022-01-18 14:19:55,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795995861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393566664] [2022-01-18 14:19:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:19:55,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:55,641 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:55,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 14:19:55,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:19:55,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:55,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:55,816 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:55,816 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 20 treesize of output 19 [2022-01-18 14:19:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:19:55,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393566664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:55,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:55,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:19:55,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799825669] [2022-01-18 14:19:55,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:55,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:19:55,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:19:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:19:55,899 INFO L87 Difference]: Start difference. First operand 22394 states and 58290 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:57,015 INFO L93 Difference]: Finished difference Result 30483 states and 76275 transitions. [2022-01-18 14:19:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 14:19:57,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:57,071 INFO L225 Difference]: With dead ends: 30483 [2022-01-18 14:19:57,071 INFO L226 Difference]: Without dead ends: 30207 [2022-01-18 14:19:57,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 14:19:57,074 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 833 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:57,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 625 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:19:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30207 states. [2022-01-18 14:19:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30207 to 22650. [2022-01-18 14:19:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22650 states, 22649 states have (on average 2.6063402357719987) internal successors, (59031), 22649 states have internal predecessors, (59031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22650 states to 22650 states and 59031 transitions. [2022-01-18 14:19:57,530 INFO L78 Accepts]: Start accepts. Automaton has 22650 states and 59031 transitions. Word has length 47 [2022-01-18 14:19:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:57,530 INFO L470 AbstractCegarLoop]: Abstraction has 22650 states and 59031 transitions. [2022-01-18 14:19:57,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22650 states and 59031 transitions. [2022-01-18 14:19:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:57,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:57,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:57,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 14:19:57,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 14:19:57,747 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash 742232627, now seen corresponding path program 83 times [2022-01-18 14:19:57,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:57,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340245550] [2022-01-18 14:19:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:57,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:57,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340245550] [2022-01-18 14:19:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340245550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138510598] [2022-01-18 14:19:57,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:19:57,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:57,851 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:57,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 14:19:57,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 14:19:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:19:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:57,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:58,020 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:19:58,020 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 20 treesize of output 19 [2022-01-18 14:19:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:19:58,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138510598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:58,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:58,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:19:58,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094513883] [2022-01-18 14:19:58,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:58,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:19:58,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:19:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:19:58,090 INFO L87 Difference]: Start difference. First operand 22650 states and 59031 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:19:58,662 INFO L93 Difference]: Finished difference Result 24813 states and 63452 transitions. [2022-01-18 14:19:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:19:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:19:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:19:58,698 INFO L225 Difference]: With dead ends: 24813 [2022-01-18 14:19:58,698 INFO L226 Difference]: Without dead ends: 24435 [2022-01-18 14:19:58,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:19:58,698 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 334 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:19:58,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 437 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:19:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24435 states. [2022-01-18 14:19:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24435 to 21611. [2022-01-18 14:19:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21611 states, 21610 states have (on average 2.6075890791300322) internal successors, (56350), 21610 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21611 states to 21611 states and 56350 transitions. [2022-01-18 14:19:59,020 INFO L78 Accepts]: Start accepts. Automaton has 21611 states and 56350 transitions. Word has length 47 [2022-01-18 14:19:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:19:59,020 INFO L470 AbstractCegarLoop]: Abstraction has 21611 states and 56350 transitions. [2022-01-18 14:19:59,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:19:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 21611 states and 56350 transitions. [2022-01-18 14:19:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:19:59,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:19:59,036 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:19:59,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 14:19:59,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:59,236 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:19:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:19:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash -952663166, now seen corresponding path program 84 times [2022-01-18 14:19:59,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:19:59,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102119513] [2022-01-18 14:19:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:19:59,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:19:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:19:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:19:59,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:19:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102119513] [2022-01-18 14:19:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102119513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:19:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038446305] [2022-01-18 14:19:59,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:19:59,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:19:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:19:59,356 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:19:59,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 14:19:59,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 14:19:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:19:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:19:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:19:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:19:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:19:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038446305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:19:59,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:19:59,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-01-18 14:19:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989492419] [2022-01-18 14:19:59,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:19:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:19:59,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:19:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:19:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:19:59,870 INFO L87 Difference]: Start difference. First operand 21611 states and 56350 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:00,331 INFO L93 Difference]: Finished difference Result 24522 states and 63115 transitions. [2022-01-18 14:20:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:20:00,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:00,368 INFO L225 Difference]: With dead ends: 24522 [2022-01-18 14:20:00,368 INFO L226 Difference]: Without dead ends: 24522 [2022-01-18 14:20:00,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:20:00,369 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 243 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:00,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 198 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24522 states. [2022-01-18 14:20:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24522 to 20542. [2022-01-18 14:20:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20542 states, 20541 states have (on average 2.5769923567499147) internal successors, (52934), 20541 states have internal predecessors, (52934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20542 states to 20542 states and 52934 transitions. [2022-01-18 14:20:00,714 INFO L78 Accepts]: Start accepts. Automaton has 20542 states and 52934 transitions. Word has length 47 [2022-01-18 14:20:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:00,714 INFO L470 AbstractCegarLoop]: Abstraction has 20542 states and 52934 transitions. [2022-01-18 14:20:00,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 20542 states and 52934 transitions. [2022-01-18 14:20:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:00,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:00,730 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:00,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 14:20:00,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:00,930 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1422396085, now seen corresponding path program 44 times [2022-01-18 14:20:00,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:00,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87145522] [2022-01-18 14:20:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:00,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:01,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87145522] [2022-01-18 14:20:01,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87145522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832415041] [2022-01-18 14:20:01,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:01,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:01,032 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:01,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 14:20:01,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:01,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:20:01,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:01,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:02,015 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:20:02,015 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 15 [2022-01-18 14:20:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:02,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832415041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:02,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:02,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 34 [2022-01-18 14:20:02,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807792618] [2022-01-18 14:20:02,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:02,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 14:20:02,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 14:20:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:20:02,106 INFO L87 Difference]: Start difference. First operand 20542 states and 52934 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:04,120 INFO L93 Difference]: Finished difference Result 36033 states and 87657 transitions. [2022-01-18 14:20:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 14:20:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:04,175 INFO L225 Difference]: With dead ends: 36033 [2022-01-18 14:20:04,175 INFO L226 Difference]: Without dead ends: 35888 [2022-01-18 14:20:04,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1043, Invalid=9463, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 14:20:04,176 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 412 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:04,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 576 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1137 Invalid, 0 Unknown, 558 Unchecked, 0.4s Time] [2022-01-18 14:20:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35888 states. [2022-01-18 14:20:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35888 to 25172. [2022-01-18 14:20:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25172 states, 25171 states have (on average 2.5370068729887567) internal successors, (63859), 25171 states have internal predecessors, (63859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25172 states to 25172 states and 63859 transitions. [2022-01-18 14:20:04,650 INFO L78 Accepts]: Start accepts. Automaton has 25172 states and 63859 transitions. Word has length 47 [2022-01-18 14:20:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:04,650 INFO L470 AbstractCegarLoop]: Abstraction has 25172 states and 63859 transitions. [2022-01-18 14:20:04,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 25172 states and 63859 transitions. [2022-01-18 14:20:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:04,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:04,670 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:04,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:04,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:04,870 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1872969269, now seen corresponding path program 45 times [2022-01-18 14:20:04,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:04,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949376697] [2022-01-18 14:20:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:04,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:04,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949376697] [2022-01-18 14:20:04,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949376697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636277724] [2022-01-18 14:20:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:04,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:04,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:04,976 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:04,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 14:20:05,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:20:05,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:05,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:05,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:05,181 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:05,181 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 20 treesize of output 19 [2022-01-18 14:20:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:05,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636277724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:05,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:05,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:20:05,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337549547] [2022-01-18 14:20:05,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:05,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:20:05,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:05,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:20:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:05,310 INFO L87 Difference]: Start difference. First operand 25172 states and 63859 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:05,792 INFO L93 Difference]: Finished difference Result 30606 states and 77046 transitions. [2022-01-18 14:20:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:20:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:05,841 INFO L225 Difference]: With dead ends: 30606 [2022-01-18 14:20:05,841 INFO L226 Difference]: Without dead ends: 30562 [2022-01-18 14:20:05,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:20:05,841 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 149 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:05,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 258 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30562 states. [2022-01-18 14:20:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30562 to 24212. [2022-01-18 14:20:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24212 states, 24211 states have (on average 2.5319069844285655) internal successors, (61300), 24211 states have internal predecessors, (61300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24212 states to 24212 states and 61300 transitions. [2022-01-18 14:20:06,243 INFO L78 Accepts]: Start accepts. Automaton has 24212 states and 61300 transitions. Word has length 47 [2022-01-18 14:20:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:06,243 INFO L470 AbstractCegarLoop]: Abstraction has 24212 states and 61300 transitions. [2022-01-18 14:20:06,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 24212 states and 61300 transitions. [2022-01-18 14:20:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:06,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:06,264 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:06,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 14:20:06,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:06,464 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1859862027, now seen corresponding path program 85 times [2022-01-18 14:20:06,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:06,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339404451] [2022-01-18 14:20:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:06,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:06,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339404451] [2022-01-18 14:20:06,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339404451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609403768] [2022-01-18 14:20:06,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:06,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:06,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:06,566 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:06,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 14:20:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:06,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:06,825 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:06,826 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 20 treesize of output 19 [2022-01-18 14:20:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:06,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609403768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:06,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:06,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 14:20:06,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515279035] [2022-01-18 14:20:06,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:06,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:20:06,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:20:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:06,904 INFO L87 Difference]: Start difference. First operand 24212 states and 61300 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:07,169 INFO L93 Difference]: Finished difference Result 24450 states and 61740 transitions. [2022-01-18 14:20:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:20:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:07,207 INFO L225 Difference]: With dead ends: 24450 [2022-01-18 14:20:07,207 INFO L226 Difference]: Without dead ends: 24362 [2022-01-18 14:20:07,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:07,207 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:07,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 232 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 581 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-18 14:20:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24362 states. [2022-01-18 14:20:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24362 to 24227. [2022-01-18 14:20:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24227 states, 24226 states have (on average 2.530050359118303) internal successors, (61293), 24226 states have internal predecessors, (61293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24227 states to 24227 states and 61293 transitions. [2022-01-18 14:20:07,545 INFO L78 Accepts]: Start accepts. Automaton has 24227 states and 61293 transitions. Word has length 47 [2022-01-18 14:20:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:07,545 INFO L470 AbstractCegarLoop]: Abstraction has 24227 states and 61293 transitions. [2022-01-18 14:20:07,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 24227 states and 61293 transitions. [2022-01-18 14:20:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:07,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:07,564 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:07,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 14:20:07,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-18 14:20:07,764 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash 318376203, now seen corresponding path program 86 times [2022-01-18 14:20:07,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:07,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809837988] [2022-01-18 14:20:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:07,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:07,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809837988] [2022-01-18 14:20:07,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809837988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518556118] [2022-01-18 14:20:07,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:07,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:07,877 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:07,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 14:20:07,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:07,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:08,236 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:08,236 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 20 treesize of output 19 [2022-01-18 14:20:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:08,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518556118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:08,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:08,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 14:20:08,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475268523] [2022-01-18 14:20:08,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:08,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:20:08,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:20:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:20:08,315 INFO L87 Difference]: Start difference. First operand 24227 states and 61293 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:08,584 INFO L93 Difference]: Finished difference Result 24438 states and 61664 transitions. [2022-01-18 14:20:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:20:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:08,620 INFO L225 Difference]: With dead ends: 24438 [2022-01-18 14:20:08,620 INFO L226 Difference]: Without dead ends: 24374 [2022-01-18 14:20:08,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:20:08,620 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:08,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 328 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 609 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-18 14:20:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24374 states. [2022-01-18 14:20:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24374 to 24231. [2022-01-18 14:20:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24231 states, 24230 states have (on average 2.529880313660751) internal successors, (61299), 24230 states have internal predecessors, (61299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24231 states to 24231 states and 61299 transitions. [2022-01-18 14:20:09,104 INFO L78 Accepts]: Start accepts. Automaton has 24231 states and 61299 transitions. Word has length 47 [2022-01-18 14:20:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:09,104 INFO L470 AbstractCegarLoop]: Abstraction has 24231 states and 61299 transitions. [2022-01-18 14:20:09,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24231 states and 61299 transitions. [2022-01-18 14:20:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:09,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:09,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:09,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 14:20:09,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 14:20:09,320 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1216998795, now seen corresponding path program 87 times [2022-01-18 14:20:09,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:09,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127363748] [2022-01-18 14:20:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:09,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:09,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127363748] [2022-01-18 14:20:09,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127363748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757255500] [2022-01-18 14:20:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:09,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:09,431 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 14:20:09,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:20:09,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:09,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:09,730 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:09,730 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 20 treesize of output 19 [2022-01-18 14:20:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:09,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757255500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:09,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:09,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 14:20:09,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108662144] [2022-01-18 14:20:09,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:09,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:20:09,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:20:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:20:09,808 INFO L87 Difference]: Start difference. First operand 24231 states and 61299 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:10,039 INFO L93 Difference]: Finished difference Result 25093 states and 63013 transitions. [2022-01-18 14:20:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:20:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:10,079 INFO L225 Difference]: With dead ends: 25093 [2022-01-18 14:20:10,080 INFO L226 Difference]: Without dead ends: 25020 [2022-01-18 14:20:10,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:20:10,080 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:10,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 217 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 487 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-01-18 14:20:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25020 states. [2022-01-18 14:20:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25020 to 24687. [2022-01-18 14:20:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 2.5209025358502797) internal successors, (62231), 24686 states have internal predecessors, (62231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 62231 transitions. [2022-01-18 14:20:10,448 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 62231 transitions. Word has length 47 [2022-01-18 14:20:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:10,448 INFO L470 AbstractCegarLoop]: Abstraction has 24687 states and 62231 transitions. [2022-01-18 14:20:10,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 62231 transitions. [2022-01-18 14:20:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:10,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:10,467 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:10,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:10,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 14:20:10,668 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash 859298519, now seen corresponding path program 46 times [2022-01-18 14:20:10,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:10,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134208172] [2022-01-18 14:20:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:10,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:10,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134208172] [2022-01-18 14:20:10,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134208172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557162073] [2022-01-18 14:20:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:10,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:10,763 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:10,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 14:20:10,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:10,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:10,932 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:10,933 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 20 treesize of output 19 [2022-01-18 14:20:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:11,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557162073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:11,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:11,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:20:11,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824149417] [2022-01-18 14:20:11,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:11,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:20:11,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:20:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:20:11,006 INFO L87 Difference]: Start difference. First operand 24687 states and 62231 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:11,461 INFO L93 Difference]: Finished difference Result 29039 states and 72501 transitions. [2022-01-18 14:20:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:20:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:11,506 INFO L225 Difference]: With dead ends: 29039 [2022-01-18 14:20:11,506 INFO L226 Difference]: Without dead ends: 28999 [2022-01-18 14:20:11,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:20:11,506 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 133 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:11,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 276 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28999 states. [2022-01-18 14:20:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28999 to 25054. [2022-01-18 14:20:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25054 states, 25053 states have (on average 2.518540693729294) internal successors, (63097), 25053 states have internal predecessors, (63097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25054 states to 25054 states and 63097 transitions. [2022-01-18 14:20:11,915 INFO L78 Accepts]: Start accepts. Automaton has 25054 states and 63097 transitions. Word has length 47 [2022-01-18 14:20:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:11,915 INFO L470 AbstractCegarLoop]: Abstraction has 25054 states and 63097 transitions. [2022-01-18 14:20:11,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 25054 states and 63097 transitions. [2022-01-18 14:20:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:11,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:11,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:11,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 14:20:12,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:12,134 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash 636456791, now seen corresponding path program 88 times [2022-01-18 14:20:12,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:12,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779819310] [2022-01-18 14:20:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:12,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:12,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779819310] [2022-01-18 14:20:12,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779819310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476739758] [2022-01-18 14:20:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:12,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:12,223 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:12,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 14:20:12,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:12,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:12,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:12,450 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:12,450 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 20 treesize of output 19 [2022-01-18 14:20:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:12,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476739758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:12,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:12,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 14:20:12,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070209662] [2022-01-18 14:20:12,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:12,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:20:12,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:20:12,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:12,540 INFO L87 Difference]: Start difference. First operand 25054 states and 63097 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:12,859 INFO L93 Difference]: Finished difference Result 25349 states and 63616 transitions. [2022-01-18 14:20:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:20:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:12,898 INFO L225 Difference]: With dead ends: 25349 [2022-01-18 14:20:12,898 INFO L226 Difference]: Without dead ends: 25303 [2022-01-18 14:20:12,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:20:12,898 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 71 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:12,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 281 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 649 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-18 14:20:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25303 states. [2022-01-18 14:20:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25303 to 25027. [2022-01-18 14:20:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25027 states, 25026 states have (on average 2.516782546152002) internal successors, (62985), 25026 states have internal predecessors, (62985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25027 states to 25027 states and 62985 transitions. [2022-01-18 14:20:13,346 INFO L78 Accepts]: Start accepts. Automaton has 25027 states and 62985 transitions. Word has length 47 [2022-01-18 14:20:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:13,346 INFO L470 AbstractCegarLoop]: Abstraction has 25027 states and 62985 transitions. [2022-01-18 14:20:13,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 25027 states and 62985 transitions. [2022-01-18 14:20:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:13,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:13,365 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:13,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 14:20:13,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-01-18 14:20:13,566 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1365741569, now seen corresponding path program 89 times [2022-01-18 14:20:13,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326138426] [2022-01-18 14:20:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:13,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:13,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326138426] [2022-01-18 14:20:13,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326138426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41846731] [2022-01-18 14:20:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:20:13,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:13,665 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:13,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 14:20:13,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 14:20:13,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:13,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:13,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:13,937 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:13,937 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 20 treesize of output 19 [2022-01-18 14:20:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:14,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41846731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:14,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:14,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 14:20:14,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627362310] [2022-01-18 14:20:14,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:14,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:20:14,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:20:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:14,026 INFO L87 Difference]: Start difference. First operand 25027 states and 62985 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:14,240 INFO L93 Difference]: Finished difference Result 25981 states and 64908 transitions. [2022-01-18 14:20:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:20:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:14,279 INFO L225 Difference]: With dead ends: 25981 [2022-01-18 14:20:14,279 INFO L226 Difference]: Without dead ends: 25918 [2022-01-18 14:20:14,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:14,280 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:14,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 147 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 402 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-01-18 14:20:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25918 states. [2022-01-18 14:20:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25918 to 25540. [2022-01-18 14:20:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25540 states, 25539 states have (on average 2.507772426484984) internal successors, (64046), 25539 states have internal predecessors, (64046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25540 states to 25540 states and 64046 transitions. [2022-01-18 14:20:14,632 INFO L78 Accepts]: Start accepts. Automaton has 25540 states and 64046 transitions. Word has length 47 [2022-01-18 14:20:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 25540 states and 64046 transitions. [2022-01-18 14:20:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 25540 states and 64046 transitions. [2022-01-18 14:20:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:14,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:14,651 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:14,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 14:20:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:14,852 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 637917488, now seen corresponding path program 47 times [2022-01-18 14:20:14,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:14,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352540958] [2022-01-18 14:20:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:14,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:14,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352540958] [2022-01-18 14:20:14,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352540958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355874457] [2022-01-18 14:20:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:20:14,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:14,946 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:14,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 14:20:14,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:20:14,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:14,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:20:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:15,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:15,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355874457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:15,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:15,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-01-18 14:20:15,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828977114] [2022-01-18 14:20:15,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:15,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:20:15,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:20:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:20:15,275 INFO L87 Difference]: Start difference. First operand 25540 states and 64046 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:15,638 INFO L93 Difference]: Finished difference Result 27576 states and 68304 transitions. [2022-01-18 14:20:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:20:15,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:15,679 INFO L225 Difference]: With dead ends: 27576 [2022-01-18 14:20:15,680 INFO L226 Difference]: Without dead ends: 27506 [2022-01-18 14:20:15,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:20:15,680 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 256 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:15,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 259 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27506 states. [2022-01-18 14:20:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27506 to 22339. [2022-01-18 14:20:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22339 states, 22338 states have (on average 2.509938221864088) internal successors, (56067), 22338 states have internal predecessors, (56067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22339 states to 22339 states and 56067 transitions. [2022-01-18 14:20:16,155 INFO L78 Accepts]: Start accepts. Automaton has 22339 states and 56067 transitions. Word has length 47 [2022-01-18 14:20:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:16,156 INFO L470 AbstractCegarLoop]: Abstraction has 22339 states and 56067 transitions. [2022-01-18 14:20:16,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 22339 states and 56067 transitions. [2022-01-18 14:20:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:16,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:16,173 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:16,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 14:20:16,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:16,374 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash -820758385, now seen corresponding path program 90 times [2022-01-18 14:20:16,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:16,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147062149] [2022-01-18 14:20:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:16,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:16,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:16,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147062149] [2022-01-18 14:20:16,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147062149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:16,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47677012] [2022-01-18 14:20:16,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:20:16,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:16,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:16,496 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 14:20:16,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:20:16,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:16,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:16,759 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:16,760 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 20 treesize of output 19 [2022-01-18 14:20:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47677012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:16,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:16,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 14:20:16,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120826112] [2022-01-18 14:20:16,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:16,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:20:16,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:20:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:16,849 INFO L87 Difference]: Start difference. First operand 22339 states and 56067 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:17,150 INFO L93 Difference]: Finished difference Result 22625 states and 56599 transitions. [2022-01-18 14:20:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:20:17,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:17,182 INFO L225 Difference]: With dead ends: 22625 [2022-01-18 14:20:17,182 INFO L226 Difference]: Without dead ends: 22549 [2022-01-18 14:20:17,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:17,183 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:17,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 298 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 556 Invalid, 0 Unknown, 211 Unchecked, 0.2s Time] [2022-01-18 14:20:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22549 states. [2022-01-18 14:20:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22549 to 22046. [2022-01-18 14:20:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22046 states, 22045 states have (on average 2.5153095940122476) internal successors, (55450), 22045 states have internal predecessors, (55450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22046 states to 22046 states and 55450 transitions. [2022-01-18 14:20:17,503 INFO L78 Accepts]: Start accepts. Automaton has 22046 states and 55450 transitions. Word has length 47 [2022-01-18 14:20:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:17,503 INFO L470 AbstractCegarLoop]: Abstraction has 22046 states and 55450 transitions. [2022-01-18 14:20:17,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22046 states and 55450 transitions. [2022-01-18 14:20:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:17,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:17,520 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:17,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:17,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:17,721 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2072068990, now seen corresponding path program 91 times [2022-01-18 14:20:17,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:17,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149787826] [2022-01-18 14:20:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:17,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:17,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149787826] [2022-01-18 14:20:17,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149787826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861588276] [2022-01-18 14:20:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:17,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:17,814 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:17,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 14:20:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 14:20:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:17,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:18,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861588276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:18,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:18,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-01-18 14:20:18,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949324168] [2022-01-18 14:20:18,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:18,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:20:18,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:18,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:20:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:20:18,233 INFO L87 Difference]: Start difference. First operand 22046 states and 55450 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:18,627 INFO L93 Difference]: Finished difference Result 25738 states and 64444 transitions. [2022-01-18 14:20:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:20:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:18,669 INFO L225 Difference]: With dead ends: 25738 [2022-01-18 14:20:18,669 INFO L226 Difference]: Without dead ends: 25738 [2022-01-18 14:20:18,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:20:18,670 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:18,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 155 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25738 states. [2022-01-18 14:20:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25738 to 22895. [2022-01-18 14:20:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22895 states, 22894 states have (on average 2.523761684284092) internal successors, (57779), 22894 states have internal predecessors, (57779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22895 states to 22895 states and 57779 transitions. [2022-01-18 14:20:19,053 INFO L78 Accepts]: Start accepts. Automaton has 22895 states and 57779 transitions. Word has length 47 [2022-01-18 14:20:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:19,053 INFO L470 AbstractCegarLoop]: Abstraction has 22895 states and 57779 transitions. [2022-01-18 14:20:19,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 22895 states and 57779 transitions. [2022-01-18 14:20:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:19,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:19,070 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:19,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 14:20:19,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:19,271 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1429418507, now seen corresponding path program 48 times [2022-01-18 14:20:19,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:19,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038754202] [2022-01-18 14:20:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:19,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:19,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:19,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038754202] [2022-01-18 14:20:19,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038754202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:19,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659768007] [2022-01-18 14:20:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:20:19,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:19,359 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:19,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 14:20:19,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:20:19,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:19,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:19,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:19,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:19,531 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:19,531 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 20 treesize of output 19 [2022-01-18 14:20:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:19,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659768007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:19,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:19,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:20:19,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924301813] [2022-01-18 14:20:19,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:19,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:20:19,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:20:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:20:19,612 INFO L87 Difference]: Start difference. First operand 22895 states and 57779 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:20,038 INFO L93 Difference]: Finished difference Result 26122 states and 65290 transitions. [2022-01-18 14:20:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:20:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:20,085 INFO L225 Difference]: With dead ends: 26122 [2022-01-18 14:20:20,085 INFO L226 Difference]: Without dead ends: 26108 [2022-01-18 14:20:20,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:20:20,085 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:20,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 298 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26108 states. [2022-01-18 14:20:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26108 to 23114. [2022-01-18 14:20:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23114 states, 23113 states have (on average 2.523904296283477) internal successors, (58335), 23113 states have internal predecessors, (58335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23114 states to 23114 states and 58335 transitions. [2022-01-18 14:20:20,444 INFO L78 Accepts]: Start accepts. Automaton has 23114 states and 58335 transitions. Word has length 47 [2022-01-18 14:20:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:20,444 INFO L470 AbstractCegarLoop]: Abstraction has 23114 states and 58335 transitions. [2022-01-18 14:20:20,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23114 states and 58335 transitions. [2022-01-18 14:20:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:20,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:20,518 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:20,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 14:20:20,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:20,719 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -539861813, now seen corresponding path program 92 times [2022-01-18 14:20:20,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:20,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875127233] [2022-01-18 14:20:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:20,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:20,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875127233] [2022-01-18 14:20:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875127233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200383706] [2022-01-18 14:20:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:20,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:20,814 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 14:20:20,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:20,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:20,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:21,029 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:21,029 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 20 treesize of output 19 [2022-01-18 14:20:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:21,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200383706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:21,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:21,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 14:20:21,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829889104] [2022-01-18 14:20:21,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:21,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:20:21,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:20:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:21,125 INFO L87 Difference]: Start difference. First operand 23114 states and 58335 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:21,304 INFO L93 Difference]: Finished difference Result 23457 states and 59021 transitions. [2022-01-18 14:20:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:20:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:21,339 INFO L225 Difference]: With dead ends: 23457 [2022-01-18 14:20:21,340 INFO L226 Difference]: Without dead ends: 23418 [2022-01-18 14:20:21,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:21,340 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:21,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-01-18 14:20:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23418 states. [2022-01-18 14:20:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23418 to 23198. [2022-01-18 14:20:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23198 states, 23197 states have (on average 2.5225244643703926) internal successors, (58515), 23197 states have internal predecessors, (58515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23198 states to 23198 states and 58515 transitions. [2022-01-18 14:20:21,657 INFO L78 Accepts]: Start accepts. Automaton has 23198 states and 58515 transitions. Word has length 47 [2022-01-18 14:20:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:21,657 INFO L470 AbstractCegarLoop]: Abstraction has 23198 states and 58515 transitions. [2022-01-18 14:20:21,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 23198 states and 58515 transitions. [2022-01-18 14:20:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:21,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:21,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:21,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:21,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:21,876 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash -858005609, now seen corresponding path program 49 times [2022-01-18 14:20:21,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:21,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605827162] [2022-01-18 14:20:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:21,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:21,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605827162] [2022-01-18 14:20:21,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605827162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561139334] [2022-01-18 14:20:21,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:21,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:21,959 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:21,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 14:20:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 14:20:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:20:22,139 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 20 treesize of output 14 [2022-01-18 14:20:22,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:20:22,141 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 10 treesize of output 1 [2022-01-18 14:20:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:22,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:22,227 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:22,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:20:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:22,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561139334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:22,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:22,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 21 [2022-01-18 14:20:22,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965283894] [2022-01-18 14:20:22,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:22,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:20:22,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:20:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:20:22,440 INFO L87 Difference]: Start difference. First operand 23198 states and 58515 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:23,434 INFO L93 Difference]: Finished difference Result 31866 states and 79160 transitions. [2022-01-18 14:20:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:20:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:23,483 INFO L225 Difference]: With dead ends: 31866 [2022-01-18 14:20:23,483 INFO L226 Difference]: Without dead ends: 31796 [2022-01-18 14:20:23,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:20:23,483 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 414 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:23,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 831 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:20:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31796 states. [2022-01-18 14:20:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31796 to 27197. [2022-01-18 14:20:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27197 states, 27196 states have (on average 2.5342697455508163) internal successors, (68922), 27196 states have internal predecessors, (68922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27197 states to 27197 states and 68922 transitions. [2022-01-18 14:20:23,968 INFO L78 Accepts]: Start accepts. Automaton has 27197 states and 68922 transitions. Word has length 47 [2022-01-18 14:20:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:23,968 INFO L470 AbstractCegarLoop]: Abstraction has 27197 states and 68922 transitions. [2022-01-18 14:20:23,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27197 states and 68922 transitions. [2022-01-18 14:20:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:23,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:23,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:24,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:24,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 14:20:24,188 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1803665303, now seen corresponding path program 93 times [2022-01-18 14:20:24,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:24,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948703940] [2022-01-18 14:20:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:24,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:24,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948703940] [2022-01-18 14:20:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948703940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839201437] [2022-01-18 14:20:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:24,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:24,280 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:24,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 14:20:24,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:20:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:24,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:24,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:24,518 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:24,518 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 20 treesize of output 19 [2022-01-18 14:20:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:24,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839201437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:24,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:24,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 14:20:24,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081278557] [2022-01-18 14:20:24,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:24,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:20:24,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:20:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:24,612 INFO L87 Difference]: Start difference. First operand 27197 states and 68922 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:24,892 INFO L93 Difference]: Finished difference Result 27246 states and 69002 transitions. [2022-01-18 14:20:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:20:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:24,935 INFO L225 Difference]: With dead ends: 27246 [2022-01-18 14:20:24,935 INFO L226 Difference]: Without dead ends: 27223 [2022-01-18 14:20:24,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:24,935 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:24,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 106 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2022-01-18 14:20:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 27197. [2022-01-18 14:20:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27197 states, 27196 states have (on average 2.533828504191793) internal successors, (68910), 27196 states have internal predecessors, (68910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27197 states to 27197 states and 68910 transitions. [2022-01-18 14:20:25,430 INFO L78 Accepts]: Start accepts. Automaton has 27197 states and 68910 transitions. Word has length 47 [2022-01-18 14:20:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:25,430 INFO L470 AbstractCegarLoop]: Abstraction has 27197 states and 68910 transitions. [2022-01-18 14:20:25,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27197 states and 68910 transitions. [2022-01-18 14:20:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:25,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:25,450 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:25,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 14:20:25,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:25,651 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:25,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash -496771877, now seen corresponding path program 50 times [2022-01-18 14:20:25,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:25,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642353813] [2022-01-18 14:20:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:25,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:25,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:25,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642353813] [2022-01-18 14:20:25,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642353813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:25,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581494455] [2022-01-18 14:20:25,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:25,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:25,740 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:25,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 14:20:25,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:25,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:25,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:25,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:25,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:25,896 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:20:25,896 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 15 [2022-01-18 14:20:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:26,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581494455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:26,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:20:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250225380] [2022-01-18 14:20:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:20:26,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:20:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:20:26,002 INFO L87 Difference]: Start difference. First operand 27197 states and 68910 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:26,420 INFO L93 Difference]: Finished difference Result 28174 states and 70971 transitions. [2022-01-18 14:20:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:20:26,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:26,465 INFO L225 Difference]: With dead ends: 28174 [2022-01-18 14:20:26,465 INFO L226 Difference]: Without dead ends: 28165 [2022-01-18 14:20:26,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:20:26,465 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 112 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:26,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 325 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28165 states. [2022-01-18 14:20:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28165 to 26980. [2022-01-18 14:20:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26980 states, 26979 states have (on average 2.534304459023685) internal successors, (68373), 26979 states have internal predecessors, (68373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26980 states to 26980 states and 68373 transitions. [2022-01-18 14:20:26,887 INFO L78 Accepts]: Start accepts. Automaton has 26980 states and 68373 transitions. Word has length 47 [2022-01-18 14:20:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:26,887 INFO L470 AbstractCegarLoop]: Abstraction has 26980 states and 68373 transitions. [2022-01-18 14:20:26,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 26980 states and 68373 transitions. [2022-01-18 14:20:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:26,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:26,907 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:26,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:27,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:27,109 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1625441525, now seen corresponding path program 94 times [2022-01-18 14:20:27,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369500770] [2022-01-18 14:20:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:27,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:27,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369500770] [2022-01-18 14:20:27,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369500770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850941884] [2022-01-18 14:20:27,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:27,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:27,190 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:27,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 14:20:27,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:27,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:27,352 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:20:27,353 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 15 [2022-01-18 14:20:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:27,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850941884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:27,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:27,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-01-18 14:20:27,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566304136] [2022-01-18 14:20:27,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:27,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:20:27,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:20:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:20:27,450 INFO L87 Difference]: Start difference. First operand 26980 states and 68373 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:27,918 INFO L93 Difference]: Finished difference Result 27646 states and 69694 transitions. [2022-01-18 14:20:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:20:27,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:27,961 INFO L225 Difference]: With dead ends: 27646 [2022-01-18 14:20:27,961 INFO L226 Difference]: Without dead ends: 27529 [2022-01-18 14:20:27,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:20:27,961 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 116 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:27,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 371 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:20:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27529 states. [2022-01-18 14:20:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27529 to 26990. [2022-01-18 14:20:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26990 states, 26989 states have (on average 2.5320315684167625) internal successors, (68337), 26989 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26990 states to 26990 states and 68337 transitions. [2022-01-18 14:20:28,560 INFO L78 Accepts]: Start accepts. Automaton has 26990 states and 68337 transitions. Word has length 47 [2022-01-18 14:20:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 26990 states and 68337 transitions. [2022-01-18 14:20:28,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 26990 states and 68337 transitions. [2022-01-18 14:20:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:28,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:28,578 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:28,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 14:20:28,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:28,779 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:28,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1011905345, now seen corresponding path program 95 times [2022-01-18 14:20:28,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:28,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77561077] [2022-01-18 14:20:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:28,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:28,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77561077] [2022-01-18 14:20:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77561077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658838117] [2022-01-18 14:20:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:20:28,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:28,866 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:28,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 14:20:28,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:20:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:29,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:29,029 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:20:29,029 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 15 [2022-01-18 14:20:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:29,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658838117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:29,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:29,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 14:20:29,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532289713] [2022-01-18 14:20:29,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:29,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:20:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:20:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:20:29,134 INFO L87 Difference]: Start difference. First operand 26990 states and 68337 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:29,532 INFO L93 Difference]: Finished difference Result 27815 states and 70065 transitions. [2022-01-18 14:20:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:20:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:29,581 INFO L225 Difference]: With dead ends: 27815 [2022-01-18 14:20:29,581 INFO L226 Difference]: Without dead ends: 27803 [2022-01-18 14:20:29,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:20:29,582 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 104 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:29,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 299 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27803 states. [2022-01-18 14:20:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27803 to 26994. [2022-01-18 14:20:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26994 states, 26993 states have (on average 2.531952728485163) internal successors, (68345), 26993 states have internal predecessors, (68345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26994 states to 26994 states and 68345 transitions. [2022-01-18 14:20:30,071 INFO L78 Accepts]: Start accepts. Automaton has 26994 states and 68345 transitions. Word has length 47 [2022-01-18 14:20:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:30,071 INFO L470 AbstractCegarLoop]: Abstraction has 26994 states and 68345 transitions. [2022-01-18 14:20:30,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26994 states and 68345 transitions. [2022-01-18 14:20:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:30,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:30,092 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:30,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 14:20:30,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:30,292 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1141144617, now seen corresponding path program 96 times [2022-01-18 14:20:30,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:30,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457076224] [2022-01-18 14:20:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:30,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:30,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:30,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457076224] [2022-01-18 14:20:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457076224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:30,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593444955] [2022-01-18 14:20:30,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:20:30,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:30,376 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:30,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 14:20:30,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:20:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:30,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:30,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:30,548 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:30,548 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 20 treesize of output 19 [2022-01-18 14:20:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:30,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593444955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:30,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:30,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:20:30,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865126623] [2022-01-18 14:20:30,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:30,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:20:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:20:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:20:30,646 INFO L87 Difference]: Start difference. First operand 26994 states and 68345 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:31,177 INFO L93 Difference]: Finished difference Result 29078 states and 72893 transitions. [2022-01-18 14:20:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:20:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:31,223 INFO L225 Difference]: With dead ends: 29078 [2022-01-18 14:20:31,223 INFO L226 Difference]: Without dead ends: 29024 [2022-01-18 14:20:31,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:20:31,223 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 262 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:31,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 381 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:20:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29024 states. [2022-01-18 14:20:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29024 to 27102. [2022-01-18 14:20:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27102 states, 27101 states have (on average 2.532341980000738) internal successors, (68629), 27101 states have internal predecessors, (68629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27102 states to 27102 states and 68629 transitions. [2022-01-18 14:20:31,681 INFO L78 Accepts]: Start accepts. Automaton has 27102 states and 68629 transitions. Word has length 47 [2022-01-18 14:20:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:31,681 INFO L470 AbstractCegarLoop]: Abstraction has 27102 states and 68629 transitions. [2022-01-18 14:20:31,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 27102 states and 68629 transitions. [2022-01-18 14:20:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:31,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:31,702 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:31,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 14:20:31,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:31,902 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash -986308083, now seen corresponding path program 97 times [2022-01-18 14:20:31,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:31,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046927506] [2022-01-18 14:20:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:31,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:31,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046927506] [2022-01-18 14:20:31,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046927506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885146976] [2022-01-18 14:20:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:20:31,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:31,991 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 14:20:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:32,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 14:20:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:20:32,177 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 20 treesize of output 14 [2022-01-18 14:20:32,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:20:32,180 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 10 treesize of output 1 [2022-01-18 14:20:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:32,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:32,281 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:32,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:20:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:32,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885146976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:32,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:32,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 24 [2022-01-18 14:20:32,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883174650] [2022-01-18 14:20:32,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:32,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:20:32,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:20:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:20:32,490 INFO L87 Difference]: Start difference. First operand 27102 states and 68629 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:34,466 INFO L93 Difference]: Finished difference Result 36740 states and 89922 transitions. [2022-01-18 14:20:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 14:20:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:34,523 INFO L225 Difference]: With dead ends: 36740 [2022-01-18 14:20:34,523 INFO L226 Difference]: Without dead ends: 36474 [2022-01-18 14:20:34,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=981, Invalid=7761, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 14:20:34,525 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1189 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:34,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 1275 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:20:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36474 states. [2022-01-18 14:20:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36474 to 28019. [2022-01-18 14:20:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28019 states, 28018 states have (on average 2.533656934827611) internal successors, (70988), 28018 states have internal predecessors, (70988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28019 states to 28019 states and 70988 transitions. [2022-01-18 14:20:35,119 INFO L78 Accepts]: Start accepts. Automaton has 28019 states and 70988 transitions. Word has length 47 [2022-01-18 14:20:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:35,120 INFO L470 AbstractCegarLoop]: Abstraction has 28019 states and 70988 transitions. [2022-01-18 14:20:35,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 28019 states and 70988 transitions. [2022-01-18 14:20:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:35,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:35,139 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:35,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 14:20:35,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 14:20:35,340 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1045999593, now seen corresponding path program 98 times [2022-01-18 14:20:35,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057982609] [2022-01-18 14:20:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:35,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:35,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:35,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057982609] [2022-01-18 14:20:35,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057982609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:35,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472006520] [2022-01-18 14:20:35,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:35,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:35,435 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:35,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 14:20:35,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:35,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:35,603 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:35,603 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 20 treesize of output 19 [2022-01-18 14:20:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:35,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472006520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:35,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:35,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:20:35,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312078662] [2022-01-18 14:20:35,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:35,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:20:35,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:20:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:20:35,681 INFO L87 Difference]: Start difference. First operand 28019 states and 70988 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:36,960 INFO L93 Difference]: Finished difference Result 40175 states and 98525 transitions. [2022-01-18 14:20:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 14:20:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:37,029 INFO L225 Difference]: With dead ends: 40175 [2022-01-18 14:20:37,029 INFO L226 Difference]: Without dead ends: 39653 [2022-01-18 14:20:37,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 14:20:37,030 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1235 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:37,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 557 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:20:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39653 states. [2022-01-18 14:20:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39653 to 28643. [2022-01-18 14:20:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28643 states, 28642 states have (on average 2.5344947978493124) internal successors, (72593), 28642 states have internal predecessors, (72593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28643 states to 28643 states and 72593 transitions. [2022-01-18 14:20:37,576 INFO L78 Accepts]: Start accepts. Automaton has 28643 states and 72593 transitions. Word has length 47 [2022-01-18 14:20:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:37,576 INFO L470 AbstractCegarLoop]: Abstraction has 28643 states and 72593 transitions. [2022-01-18 14:20:37,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28643 states and 72593 transitions. [2022-01-18 14:20:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:37,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:37,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:37,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 14:20:37,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:37,797 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1199313459, now seen corresponding path program 99 times [2022-01-18 14:20:37,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891389894] [2022-01-18 14:20:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:37,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:37,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891389894] [2022-01-18 14:20:37,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891389894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492004901] [2022-01-18 14:20:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:37,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:37,898 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:37,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 14:20:37,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 14:20:37,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:38,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:38,068 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:38,068 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 20 treesize of output 19 [2022-01-18 14:20:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:20:38,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492004901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:38,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:38,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:20:38,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307690987] [2022-01-18 14:20:38,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:38,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:20:38,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:20:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:20:38,137 INFO L87 Difference]: Start difference. First operand 28643 states and 72593 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:40,053 INFO L93 Difference]: Finished difference Result 45394 states and 112859 transitions. [2022-01-18 14:20:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 14:20:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:40,131 INFO L225 Difference]: With dead ends: 45394 [2022-01-18 14:20:40,131 INFO L226 Difference]: Without dead ends: 44776 [2022-01-18 14:20:40,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6451 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 14:20:40,133 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1702 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:40,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 481 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:20:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44776 states. [2022-01-18 14:20:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44776 to 31291. [2022-01-18 14:20:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31291 states, 31290 states have (on average 2.5506232023010544) internal successors, (79809), 31290 states have internal predecessors, (79809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31291 states to 31291 states and 79809 transitions. [2022-01-18 14:20:40,824 INFO L78 Accepts]: Start accepts. Automaton has 31291 states and 79809 transitions. Word has length 47 [2022-01-18 14:20:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:40,824 INFO L470 AbstractCegarLoop]: Abstraction has 31291 states and 79809 transitions. [2022-01-18 14:20:40,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 31291 states and 79809 transitions. [2022-01-18 14:20:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 14:20:40,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:40,845 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:40,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 14:20:41,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:41,046 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507479, now seen corresponding path program 100 times [2022-01-18 14:20:41,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:41,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90363009] [2022-01-18 14:20:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:41,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:41,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:41,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90363009] [2022-01-18 14:20:41,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90363009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:41,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710482382] [2022-01-18 14:20:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:41,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:41,154 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 14:20:41,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:41,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 14:20:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:41,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:20:41,404 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 20 treesize of output 14 [2022-01-18 14:20:41,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:20:41,406 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 10 treesize of output 1 [2022-01-18 14:20:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:41,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:41,618 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:41,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:20:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:20:41,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710482382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:41,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:41,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 33 [2022-01-18 14:20:41,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634283656] [2022-01-18 14:20:41,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:41,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 14:20:41,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 14:20:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:20:41,790 INFO L87 Difference]: Start difference. First operand 31291 states and 79809 transitions. Second operand has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:45,565 INFO L93 Difference]: Finished difference Result 53023 states and 130282 transitions. [2022-01-18 14:20:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-18 14:20:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 14:20:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:45,658 INFO L225 Difference]: With dead ends: 53023 [2022-01-18 14:20:45,658 INFO L226 Difference]: Without dead ends: 52117 [2022-01-18 14:20:45,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7787 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2586, Invalid=20670, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 14:20:45,661 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1765 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 3855 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:45,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 1579 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3855 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 14:20:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52117 states. [2022-01-18 14:20:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52117 to 33886. [2022-01-18 14:20:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33886 states, 33885 states have (on average 2.554375092223698) internal successors, (86555), 33885 states have internal predecessors, (86555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33886 states to 33886 states and 86555 transitions. [2022-01-18 14:20:46,526 INFO L78 Accepts]: Start accepts. Automaton has 33886 states and 86555 transitions. Word has length 47 [2022-01-18 14:20:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:46,526 INFO L470 AbstractCegarLoop]: Abstraction has 33886 states and 86555 transitions. [2022-01-18 14:20:46,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 33886 states and 86555 transitions. [2022-01-18 14:20:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:46,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:46,549 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:46,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 14:20:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:46,749 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash -539236665, now seen corresponding path program 101 times [2022-01-18 14:20:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718556674] [2022-01-18 14:20:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:46,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718556674] [2022-01-18 14:20:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718556674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142682902] [2022-01-18 14:20:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:20:46,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:46,819 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:46,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 14:20:46,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:20:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 14:20:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:46,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:47,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142682902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:47,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:47,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 14:20:47,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304735339] [2022-01-18 14:20:47,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:47,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:20:47,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:20:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:47,114 INFO L87 Difference]: Start difference. First operand 33886 states and 86555 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:47,451 INFO L93 Difference]: Finished difference Result 35433 states and 89971 transitions. [2022-01-18 14:20:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:20:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:47,508 INFO L225 Difference]: With dead ends: 35433 [2022-01-18 14:20:47,508 INFO L226 Difference]: Without dead ends: 35399 [2022-01-18 14:20:47,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:47,509 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:47,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 266 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35399 states. [2022-01-18 14:20:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35399 to 34688. [2022-01-18 14:20:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34688 states, 34687 states have (on average 2.5474673508807335) internal successors, (88364), 34687 states have internal predecessors, (88364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34688 states to 34688 states and 88364 transitions. [2022-01-18 14:20:48,073 INFO L78 Accepts]: Start accepts. Automaton has 34688 states and 88364 transitions. Word has length 50 [2022-01-18 14:20:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:48,073 INFO L470 AbstractCegarLoop]: Abstraction has 34688 states and 88364 transitions. [2022-01-18 14:20:48,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34688 states and 88364 transitions. [2022-01-18 14:20:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:48,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:48,097 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:48,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 14:20:48,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:48,307 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash 547340560, now seen corresponding path program 51 times [2022-01-18 14:20:48,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819553180] [2022-01-18 14:20:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:48,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:20:48,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819553180] [2022-01-18 14:20:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819553180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096491258] [2022-01-18 14:20:48,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:48,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:48,378 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:48,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 14:20:48,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:20:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 14:20:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:20:48,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:20:48,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096491258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:48,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:48,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 14:20:48,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634541051] [2022-01-18 14:20:48,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:48,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:20:48,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:20:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:48,665 INFO L87 Difference]: Start difference. First operand 34688 states and 88364 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:48,996 INFO L93 Difference]: Finished difference Result 35842 states and 90763 transitions. [2022-01-18 14:20:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:20:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:49,054 INFO L225 Difference]: With dead ends: 35842 [2022-01-18 14:20:49,054 INFO L226 Difference]: Without dead ends: 35803 [2022-01-18 14:20:49,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:49,055 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:49,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 267 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35803 states. [2022-01-18 14:20:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35803 to 34688. [2022-01-18 14:20:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34688 states, 34687 states have (on average 2.547207887681264) internal successors, (88355), 34687 states have internal predecessors, (88355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34688 states to 34688 states and 88355 transitions. [2022-01-18 14:20:49,785 INFO L78 Accepts]: Start accepts. Automaton has 34688 states and 88355 transitions. Word has length 50 [2022-01-18 14:20:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:49,785 INFO L470 AbstractCegarLoop]: Abstraction has 34688 states and 88355 transitions. [2022-01-18 14:20:49,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 34688 states and 88355 transitions. [2022-01-18 14:20:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:49,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:49,811 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:49,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 14:20:50,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 14:20:50,011 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1656654610, now seen corresponding path program 1 times [2022-01-18 14:20:50,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559152376] [2022-01-18 14:20:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:50,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:50,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:50,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559152376] [2022-01-18 14:20:50,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559152376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:50,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356744244] [2022-01-18 14:20:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:50,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:50,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:50,152 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:50,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 14:20:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:50,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:50,601 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:50,602 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 20 treesize of output 19 [2022-01-18 14:20:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:20:50,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356744244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:50,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:50,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-01-18 14:20:50,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475413319] [2022-01-18 14:20:50,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:50,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 14:20:50,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 14:20:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:20:50,664 INFO L87 Difference]: Start difference. First operand 34688 states and 88355 transitions. Second operand has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:51,202 INFO L93 Difference]: Finished difference Result 34847 states and 88604 transitions. [2022-01-18 14:20:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:20:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:51,263 INFO L225 Difference]: With dead ends: 34847 [2022-01-18 14:20:51,263 INFO L226 Difference]: Without dead ends: 34687 [2022-01-18 14:20:51,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:20:51,263 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:51,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 335 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1227 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-01-18 14:20:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34687 states. [2022-01-18 14:20:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34687 to 34625. [2022-01-18 14:20:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 2.5462396025878005) internal successors, (88161), 34624 states have internal predecessors, (88161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 88161 transitions. [2022-01-18 14:20:51,818 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 88161 transitions. Word has length 50 [2022-01-18 14:20:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:51,818 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 88161 transitions. [2022-01-18 14:20:51,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 88161 transitions. [2022-01-18 14:20:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:51,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:51,842 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:51,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 14:20:52,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 14:20:52,043 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1679284717, now seen corresponding path program 102 times [2022-01-18 14:20:52,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:52,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105200134] [2022-01-18 14:20:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:52,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:20:52,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105200134] [2022-01-18 14:20:52,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105200134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829561153] [2022-01-18 14:20:52,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:20:52,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:52,116 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:52,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 14:20:52,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 14:20:52,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:52,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 14:20:52,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:20:52,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:20:52,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829561153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:52,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:52,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 14:20:52,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297056417] [2022-01-18 14:20:52,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:52,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:20:52,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:20:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:52,410 INFO L87 Difference]: Start difference. First operand 34625 states and 88161 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:52,747 INFO L93 Difference]: Finished difference Result 35694 states and 90392 transitions. [2022-01-18 14:20:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:20:52,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:52,804 INFO L225 Difference]: With dead ends: 35694 [2022-01-18 14:20:52,804 INFO L226 Difference]: Without dead ends: 35642 [2022-01-18 14:20:52,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:52,804 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 81 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:52,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 276 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35642 states. [2022-01-18 14:20:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35642 to 34625. [2022-01-18 14:20:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 2.545286506469501) internal successors, (88128), 34624 states have internal predecessors, (88128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 88128 transitions. [2022-01-18 14:20:53,478 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 88128 transitions. Word has length 50 [2022-01-18 14:20:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:53,478 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 88128 transitions. [2022-01-18 14:20:53,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 88128 transitions. [2022-01-18 14:20:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:53,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:53,502 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:53,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 14:20:53,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 14:20:53,703 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1330720574, now seen corresponding path program 52 times [2022-01-18 14:20:53,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:53,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091852619] [2022-01-18 14:20:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:53,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:20:53,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:53,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091852619] [2022-01-18 14:20:53,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091852619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:53,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955151815] [2022-01-18 14:20:53,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:53,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:53,773 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:53,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 14:20:53,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:53,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 14:20:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:20:53,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 14:20:54,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955151815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:54,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:54,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 14:20:54,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799850078] [2022-01-18 14:20:54,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:54,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:20:54,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:20:54,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:54,058 INFO L87 Difference]: Start difference. First operand 34625 states and 88128 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:54,403 INFO L93 Difference]: Finished difference Result 35658 states and 90295 transitions. [2022-01-18 14:20:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:20:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:54,461 INFO L225 Difference]: With dead ends: 35658 [2022-01-18 14:20:54,462 INFO L226 Difference]: Without dead ends: 35607 [2022-01-18 14:20:54,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:20:54,462 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:54,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 284 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:20:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35607 states. [2022-01-18 14:20:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35607 to 34625. [2022-01-18 14:20:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 2.5445644639556377) internal successors, (88103), 34624 states have internal predecessors, (88103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 88103 transitions. [2022-01-18 14:20:55,062 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 88103 transitions. Word has length 50 [2022-01-18 14:20:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:55,062 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 88103 transitions. [2022-01-18 14:20:55,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 88103 transitions. [2022-01-18 14:20:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:55,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:55,088 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:55,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 14:20:55,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 14:20:55,289 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash 665028206, now seen corresponding path program 2 times [2022-01-18 14:20:55,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:55,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679465409] [2022-01-18 14:20:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:55,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:55,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:55,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679465409] [2022-01-18 14:20:55,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679465409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:55,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18290767] [2022-01-18 14:20:55,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:20:55,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:55,441 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:55,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 14:20:55,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:20:55,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:55,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:55,885 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:55,885 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 20 treesize of output 19 [2022-01-18 14:20:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18290767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:55,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:55,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 14:20:55,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800526888] [2022-01-18 14:20:55,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:55,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 14:20:55,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 14:20:55,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:20:55,947 INFO L87 Difference]: Start difference. First operand 34625 states and 88103 transitions. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:56,303 INFO L93 Difference]: Finished difference Result 34790 states and 88361 transitions. [2022-01-18 14:20:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:20:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:56,359 INFO L225 Difference]: With dead ends: 34790 [2022-01-18 14:20:56,359 INFO L226 Difference]: Without dead ends: 34647 [2022-01-18 14:20:56,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:20:56,359 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:56,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 262 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 686 Invalid, 0 Unknown, 321 Unchecked, 0.2s Time] [2022-01-18 14:20:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34647 states. [2022-01-18 14:20:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34647 to 34080. [2022-01-18 14:20:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34080 states, 34079 states have (on average 2.5513952874204056) internal successors, (86949), 34079 states have internal predecessors, (86949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34080 states to 34080 states and 86949 transitions. [2022-01-18 14:20:56,907 INFO L78 Accepts]: Start accepts. Automaton has 34080 states and 86949 transitions. Word has length 50 [2022-01-18 14:20:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 34080 states and 86949 transitions. [2022-01-18 14:20:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 34080 states and 86949 transitions. [2022-01-18 14:20:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:56,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:56,931 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:56,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-18 14:20:57,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:57,132 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1283395892, now seen corresponding path program 3 times [2022-01-18 14:20:57,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:57,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96273125] [2022-01-18 14:20:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:57,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:57,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:57,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96273125] [2022-01-18 14:20:57,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96273125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:57,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960931828] [2022-01-18 14:20:57,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:20:57,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:57,245 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:57,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 14:20:57,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 14:20:57,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:57,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:57,557 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:57,557 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 20 treesize of output 19 [2022-01-18 14:20:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:57,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960931828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:57,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:57,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 14:20:57,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839734484] [2022-01-18 14:20:57,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:57,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:20:57,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:57,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:20:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:20:57,628 INFO L87 Difference]: Start difference. First operand 34080 states and 86949 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:57,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:57,925 INFO L93 Difference]: Finished difference Result 34164 states and 87076 transitions. [2022-01-18 14:20:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:20:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:20:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:57,979 INFO L225 Difference]: With dead ends: 34164 [2022-01-18 14:20:57,979 INFO L226 Difference]: Without dead ends: 34070 [2022-01-18 14:20:57,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:20:57,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:57,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 173 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-01-18 14:20:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34070 states. [2022-01-18 14:20:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34070 to 34044. [2022-01-18 14:20:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 34043 states have (on average 2.551067767235555) internal successors, (86846), 34043 states have internal predecessors, (86846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 86846 transitions. [2022-01-18 14:20:58,524 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 86846 transitions. Word has length 50 [2022-01-18 14:20:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:20:58,524 INFO L470 AbstractCegarLoop]: Abstraction has 34044 states and 86846 transitions. [2022-01-18 14:20:58,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:20:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 86846 transitions. [2022-01-18 14:20:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:20:58,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:20:58,647 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:20:58,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-01-18 14:20:58,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 14:20:58,847 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:20:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:20:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1528982738, now seen corresponding path program 4 times [2022-01-18 14:20:58,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:20:58,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581169716] [2022-01-18 14:20:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:20:58,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:20:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:20:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:58,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:20:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581169716] [2022-01-18 14:20:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581169716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:20:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766644644] [2022-01-18 14:20:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:20:58,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:20:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:20:58,966 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:20:58,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 14:20:58,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:20:58,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:20:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 14:20:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:20:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:59,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:20:59,234 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:20:59,234 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 20 treesize of output 19 [2022-01-18 14:20:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:20:59,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766644644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:20:59,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:20:59,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 14:20:59,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433149880] [2022-01-18 14:20:59,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:20:59,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:20:59,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:20:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:20:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:59,315 INFO L87 Difference]: Start difference. First operand 34044 states and 86846 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 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) [2022-01-18 14:20:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:20:59,577 INFO L93 Difference]: Finished difference Result 34070 states and 86872 transitions. [2022-01-18 14:20:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:20:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 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) Word has length 50 [2022-01-18 14:20:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:20:59,630 INFO L225 Difference]: With dead ends: 34070 [2022-01-18 14:20:59,631 INFO L226 Difference]: Without dead ends: 33979 [2022-01-18 14:20:59,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:20:59,631 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:20:59,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 107 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 508 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-01-18 14:20:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33979 states. [2022-01-18 14:21:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33979 to 33862. [2022-01-18 14:21:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33862 states, 33861 states have (on average 2.5514899146510737) internal successors, (86396), 33861 states have internal predecessors, (86396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33862 states to 33862 states and 86396 transitions. [2022-01-18 14:21:00,163 INFO L78 Accepts]: Start accepts. Automaton has 33862 states and 86396 transitions. Word has length 50 [2022-01-18 14:21:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:00,163 INFO L470 AbstractCegarLoop]: Abstraction has 33862 states and 86396 transitions. [2022-01-18 14:21:00,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 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) [2022-01-18 14:21:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 33862 states and 86396 transitions. [2022-01-18 14:21:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 14:21:00,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:00,187 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:00,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 14:21:00,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 14:21:00,387 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -648745823, now seen corresponding path program 103 times [2022-01-18 14:21:00,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:00,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497733266] [2022-01-18 14:21:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:00,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:21:00,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497733266] [2022-01-18 14:21:00,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497733266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325462482] [2022-01-18 14:21:00,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:21:00,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:00,456 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:00,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 14:21:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 14:21:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:21:00,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:21:00,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325462482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:00,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:00,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-18 14:21:00,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627450631] [2022-01-18 14:21:00,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:00,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:21:00,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:21:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:21:00,756 INFO L87 Difference]: Start difference. First operand 33862 states and 86396 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:01,103 INFO L93 Difference]: Finished difference Result 36593 states and 92480 transitions. [2022-01-18 14:21:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:21:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 14:21:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:01,161 INFO L225 Difference]: With dead ends: 36593 [2022-01-18 14:21:01,161 INFO L226 Difference]: Without dead ends: 36532 [2022-01-18 14:21:01,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:21:01,161 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:01,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 284 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:21:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36532 states. [2022-01-18 14:21:01,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36532 to 34558. [2022-01-18 14:21:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34558 states, 34557 states have (on average 2.5533466446740167) internal successors, (88236), 34557 states have internal predecessors, (88236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34558 states to 34558 states and 88236 transitions. [2022-01-18 14:21:01,761 INFO L78 Accepts]: Start accepts. Automaton has 34558 states and 88236 transitions. Word has length 50 [2022-01-18 14:21:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:01,761 INFO L470 AbstractCegarLoop]: Abstraction has 34558 states and 88236 transitions. [2022-01-18 14:21:01,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 34558 states and 88236 transitions. [2022-01-18 14:21:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:01,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:01,788 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:01,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 14:21:01,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 14:21:01,988 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 487346049, now seen corresponding path program 104 times [2022-01-18 14:21:01,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:01,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919557914] [2022-01-18 14:21:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:01,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:02,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919557914] [2022-01-18 14:21:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919557914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156309592] [2022-01-18 14:21:02,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:02,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:02,167 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:02,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 14:21:02,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:02,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:21:02,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:02,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156309592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:02,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:02,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2022-01-18 14:21:02,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764895343] [2022-01-18 14:21:02,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:02,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:21:02,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:21:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:21:02,690 INFO L87 Difference]: Start difference. First operand 34558 states and 88236 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:03,299 INFO L93 Difference]: Finished difference Result 37934 states and 96009 transitions. [2022-01-18 14:21:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:21:03,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:03,362 INFO L225 Difference]: With dead ends: 37934 [2022-01-18 14:21:03,362 INFO L226 Difference]: Without dead ends: 37934 [2022-01-18 14:21:03,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=415, Invalid=917, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:21:03,363 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 274 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:03,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 234 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:21:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37934 states. [2022-01-18 14:21:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37934 to 34153. [2022-01-18 14:21:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34153 states, 34152 states have (on average 2.5534082923401265) internal successors, (87204), 34152 states have internal predecessors, (87204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34153 states to 34153 states and 87204 transitions. [2022-01-18 14:21:04,097 INFO L78 Accepts]: Start accepts. Automaton has 34153 states and 87204 transitions. Word has length 53 [2022-01-18 14:21:04,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:04,097 INFO L470 AbstractCegarLoop]: Abstraction has 34153 states and 87204 transitions. [2022-01-18 14:21:04,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 34153 states and 87204 transitions. [2022-01-18 14:21:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:04,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:04,124 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:04,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 14:21:04,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-01-18 14:21:04,325 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1334489720, now seen corresponding path program 53 times [2022-01-18 14:21:04,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:04,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426601500] [2022-01-18 14:21:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:04,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:04,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426601500] [2022-01-18 14:21:04,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426601500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285291334] [2022-01-18 14:21:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:21:04,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:04,461 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 14:21:04,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:21:04,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:04,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:04,653 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:04,653 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 20 treesize of output 19 [2022-01-18 14:21:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285291334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:04,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:04,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-01-18 14:21:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849155189] [2022-01-18 14:21:04,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:04,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:21:04,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:21:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:04,722 INFO L87 Difference]: Start difference. First operand 34153 states and 87204 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:05,602 INFO L93 Difference]: Finished difference Result 39403 states and 99402 transitions. [2022-01-18 14:21:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:21:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:05,667 INFO L225 Difference]: With dead ends: 39403 [2022-01-18 14:21:05,668 INFO L226 Difference]: Without dead ends: 39346 [2022-01-18 14:21:05,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:21:05,668 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 574 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:05,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 698 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39346 states. [2022-01-18 14:21:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39346 to 33633. [2022-01-18 14:21:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33633 states, 33632 states have (on average 2.5527473834443386) internal successors, (85854), 33632 states have internal predecessors, (85854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33633 states to 33633 states and 85854 transitions. [2022-01-18 14:21:06,255 INFO L78 Accepts]: Start accepts. Automaton has 33633 states and 85854 transitions. Word has length 53 [2022-01-18 14:21:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:06,255 INFO L470 AbstractCegarLoop]: Abstraction has 33633 states and 85854 transitions. [2022-01-18 14:21:06,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33633 states and 85854 transitions. [2022-01-18 14:21:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:06,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:06,281 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:06,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 14:21:06,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:06,481 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 723607176, now seen corresponding path program 105 times [2022-01-18 14:21:06,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:06,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588881043] [2022-01-18 14:21:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:06,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:06,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588881043] [2022-01-18 14:21:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588881043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193888396] [2022-01-18 14:21:06,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:06,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:06,582 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:06,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 14:21:06,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 14:21:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:06,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:06,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:06,832 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:06,832 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 20 treesize of output 19 [2022-01-18 14:21:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:06,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193888396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:06,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:06,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:21:06,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507960731] [2022-01-18 14:21:06,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:06,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:21:06,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:06,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:21:06,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:21:06,943 INFO L87 Difference]: Start difference. First operand 33633 states and 85854 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:07,321 INFO L93 Difference]: Finished difference Result 34076 states and 86681 transitions. [2022-01-18 14:21:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:21:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:07,376 INFO L225 Difference]: With dead ends: 34076 [2022-01-18 14:21:07,376 INFO L226 Difference]: Without dead ends: 34026 [2022-01-18 14:21:07,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:21:07,376 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 98 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:07,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 435 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 839 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2022-01-18 14:21:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34026 states. [2022-01-18 14:21:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34026 to 33651. [2022-01-18 14:21:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33651 states, 33650 states have (on average 2.5522734026745915) internal successors, (85884), 33650 states have internal predecessors, (85884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33651 states to 33651 states and 85884 transitions. [2022-01-18 14:21:07,989 INFO L78 Accepts]: Start accepts. Automaton has 33651 states and 85884 transitions. Word has length 53 [2022-01-18 14:21:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:07,989 INFO L470 AbstractCegarLoop]: Abstraction has 33651 states and 85884 transitions. [2022-01-18 14:21:07,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33651 states and 85884 transitions. [2022-01-18 14:21:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:08,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:08,015 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:08,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 14:21:08,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:08,216 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2046886724, now seen corresponding path program 106 times [2022-01-18 14:21:08,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:08,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540434273] [2022-01-18 14:21:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:08,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:08,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540434273] [2022-01-18 14:21:08,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540434273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85622173] [2022-01-18 14:21:08,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:21:08,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:08,328 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:08,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 14:21:08,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:21:08,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:08,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:08,512 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:08,512 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 15 [2022-01-18 14:21:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:08,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85622173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:08,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:08,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-18 14:21:08,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131118544] [2022-01-18 14:21:08,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:08,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:08,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:08,635 INFO L87 Difference]: Start difference. First operand 33651 states and 85884 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:08,952 INFO L93 Difference]: Finished difference Result 33796 states and 86110 transitions. [2022-01-18 14:21:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:21:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:09,009 INFO L225 Difference]: With dead ends: 33796 [2022-01-18 14:21:09,009 INFO L226 Difference]: Without dead ends: 33764 [2022-01-18 14:21:09,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:09,009 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:09,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 195 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:21:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33764 states. [2022-01-18 14:21:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33764 to 33657. [2022-01-18 14:21:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33657 states, 33656 states have (on average 2.5519966722129785) internal successors, (85890), 33656 states have internal predecessors, (85890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33657 states to 33657 states and 85890 transitions. [2022-01-18 14:21:09,543 INFO L78 Accepts]: Start accepts. Automaton has 33657 states and 85890 transitions. Word has length 53 [2022-01-18 14:21:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:09,543 INFO L470 AbstractCegarLoop]: Abstraction has 33657 states and 85890 transitions. [2022-01-18 14:21:09,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33657 states and 85890 transitions. [2022-01-18 14:21:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:09,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:09,575 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:09,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:09,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 14:21:09,791 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1634544392, now seen corresponding path program 107 times [2022-01-18 14:21:09,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:09,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302405546] [2022-01-18 14:21:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:09,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:09,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302405546] [2022-01-18 14:21:09,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302405546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256160428] [2022-01-18 14:21:09,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:21:09,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:09,888 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:09,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 14:21:09,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:21:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:09,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:09,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:10,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:10,060 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:10,060 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 15 [2022-01-18 14:21:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:10,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256160428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:10,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:10,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:10,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268035951] [2022-01-18 14:21:10,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:10,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:10,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:10,179 INFO L87 Difference]: Start difference. First operand 33657 states and 85890 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:10,631 INFO L93 Difference]: Finished difference Result 34600 states and 87892 transitions. [2022-01-18 14:21:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:10,682 INFO L225 Difference]: With dead ends: 34600 [2022-01-18 14:21:10,682 INFO L226 Difference]: Without dead ends: 34576 [2022-01-18 14:21:10,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:10,682 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:10,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 159 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:21:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34576 states. [2022-01-18 14:21:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34576 to 33662. [2022-01-18 14:21:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33662 states, 33661 states have (on average 2.5521523424734855) internal successors, (85908), 33661 states have internal predecessors, (85908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33662 states to 33662 states and 85908 transitions. [2022-01-18 14:21:11,211 INFO L78 Accepts]: Start accepts. Automaton has 33662 states and 85908 transitions. Word has length 53 [2022-01-18 14:21:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:11,212 INFO L470 AbstractCegarLoop]: Abstraction has 33662 states and 85908 transitions. [2022-01-18 14:21:11,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 33662 states and 85908 transitions. [2022-01-18 14:21:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:11,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:11,237 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:11,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 14:21:11,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 14:21:11,438 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1452891954, now seen corresponding path program 108 times [2022-01-18 14:21:11,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:11,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409216837] [2022-01-18 14:21:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:11,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:11,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409216837] [2022-01-18 14:21:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409216837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027345956] [2022-01-18 14:21:11,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:21:11,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:11,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:11,548 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:11,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 14:21:11,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:21:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:11,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:11,817 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:11,818 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 20 treesize of output 19 [2022-01-18 14:21:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027345956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:11,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:11,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:21:11,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368819787] [2022-01-18 14:21:11,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:21:11,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:21:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:21:11,922 INFO L87 Difference]: Start difference. First operand 33662 states and 85908 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:12,299 INFO L93 Difference]: Finished difference Result 33840 states and 86194 transitions. [2022-01-18 14:21:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:21:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:12,353 INFO L225 Difference]: With dead ends: 33840 [2022-01-18 14:21:12,354 INFO L226 Difference]: Without dead ends: 33764 [2022-01-18 14:21:12,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:21:12,354 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:12,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 277 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 836 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-01-18 14:21:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33764 states. [2022-01-18 14:21:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33764 to 33656. [2022-01-18 14:21:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33656 states, 33655 states have (on average 2.5518050809686526) internal successors, (85881), 33655 states have internal predecessors, (85881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33656 states to 33656 states and 85881 transitions. [2022-01-18 14:21:12,860 INFO L78 Accepts]: Start accepts. Automaton has 33656 states and 85881 transitions. Word has length 53 [2022-01-18 14:21:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:12,860 INFO L470 AbstractCegarLoop]: Abstraction has 33656 states and 85881 transitions. [2022-01-18 14:21:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33656 states and 85881 transitions. [2022-01-18 14:21:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:12,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:12,887 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:12,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-01-18 14:21:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 14:21:13,088 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -525749867, now seen corresponding path program 54 times [2022-01-18 14:21:13,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:13,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911731908] [2022-01-18 14:21:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:13,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:13,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911731908] [2022-01-18 14:21:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911731908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736597357] [2022-01-18 14:21:13,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:21:13,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:13,229 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:13,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 14:21:13,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:21:13,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:21:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:13,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:21:14,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736597357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:14,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:14,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 38 [2022-01-18 14:21:14,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001282443] [2022-01-18 14:21:14,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:14,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 14:21:14,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 14:21:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:21:14,247 INFO L87 Difference]: Start difference. First operand 33656 states and 85881 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:15,014 INFO L93 Difference]: Finished difference Result 39749 states and 99054 transitions. [2022-01-18 14:21:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:21:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:15,083 INFO L225 Difference]: With dead ends: 39749 [2022-01-18 14:21:15,083 INFO L226 Difference]: Without dead ends: 39606 [2022-01-18 14:21:15,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=851, Invalid=2455, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 14:21:15,084 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 755 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:15,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 282 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:21:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39606 states. [2022-01-18 14:21:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39606 to 33884. [2022-01-18 14:21:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33884 states, 33883 states have (on average 2.5614319865419235) internal successors, (86789), 33883 states have internal predecessors, (86789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33884 states to 33884 states and 86789 transitions. [2022-01-18 14:21:15,875 INFO L78 Accepts]: Start accepts. Automaton has 33884 states and 86789 transitions. Word has length 53 [2022-01-18 14:21:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:15,875 INFO L470 AbstractCegarLoop]: Abstraction has 33884 states and 86789 transitions. [2022-01-18 14:21:15,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 33884 states and 86789 transitions. [2022-01-18 14:21:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:15,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:15,901 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:15,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 14:21:16,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 14:21:16,102 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:16,102 INFO L85 PathProgramCache]: Analyzing trace with hash 279114444, now seen corresponding path program 55 times [2022-01-18 14:21:16,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:16,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681111844] [2022-01-18 14:21:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:16,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:16,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:16,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681111844] [2022-01-18 14:21:16,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681111844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:16,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176121020] [2022-01-18 14:21:16,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:21:16,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:16,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:16,205 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:16,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 14:21:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:16,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:16,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:16,380 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:16,380 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 15 [2022-01-18 14:21:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:16,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176121020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:16,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:16,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:16,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33844851] [2022-01-18 14:21:16,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:16,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:16,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:16,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:16,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:16,499 INFO L87 Difference]: Start difference. First operand 33884 states and 86789 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:16,973 INFO L93 Difference]: Finished difference Result 35869 states and 90945 transitions. [2022-01-18 14:21:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:16,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:17,036 INFO L225 Difference]: With dead ends: 35869 [2022-01-18 14:21:17,036 INFO L226 Difference]: Without dead ends: 35818 [2022-01-18 14:21:17,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:17,036 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 198 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:17,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 411 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:21:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35818 states. [2022-01-18 14:21:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35818 to 34090. [2022-01-18 14:21:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34090 states, 34089 states have (on average 2.5612954325442225) internal successors, (87312), 34089 states have internal predecessors, (87312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34090 states to 34090 states and 87312 transitions. [2022-01-18 14:21:17,624 INFO L78 Accepts]: Start accepts. Automaton has 34090 states and 87312 transitions. Word has length 53 [2022-01-18 14:21:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:17,624 INFO L470 AbstractCegarLoop]: Abstraction has 34090 states and 87312 transitions. [2022-01-18 14:21:17,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 34090 states and 87312 transitions. [2022-01-18 14:21:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:17,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:17,649 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:17,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-18 14:21:17,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:17,849 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1893639450, now seen corresponding path program 109 times [2022-01-18 14:21:17,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:17,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566305608] [2022-01-18 14:21:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:17,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:17,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:17,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566305608] [2022-01-18 14:21:17,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566305608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:17,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816700728] [2022-01-18 14:21:17,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:21:17,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:17,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:17,947 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 14:21:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:18,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:18,225 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:18,225 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 15 [2022-01-18 14:21:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:18,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816700728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:18,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:18,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-18 14:21:18,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748308098] [2022-01-18 14:21:18,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:18,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:18,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:18,352 INFO L87 Difference]: Start difference. First operand 34090 states and 87312 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:18,911 INFO L93 Difference]: Finished difference Result 34819 states and 88705 transitions. [2022-01-18 14:21:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:18,969 INFO L225 Difference]: With dead ends: 34819 [2022-01-18 14:21:18,969 INFO L226 Difference]: Without dead ends: 34769 [2022-01-18 14:21:18,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:18,969 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 111 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:18,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 407 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34769 states. [2022-01-18 14:21:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34769 to 34123. [2022-01-18 14:21:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34123 states, 34122 states have (on average 2.560195768126136) internal successors, (87359), 34122 states have internal predecessors, (87359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34123 states to 34123 states and 87359 transitions. [2022-01-18 14:21:19,632 INFO L78 Accepts]: Start accepts. Automaton has 34123 states and 87359 transitions. Word has length 53 [2022-01-18 14:21:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:19,632 INFO L470 AbstractCegarLoop]: Abstraction has 34123 states and 87359 transitions. [2022-01-18 14:21:19,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 34123 states and 87359 transitions. [2022-01-18 14:21:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:19,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:19,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:19,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 14:21:19,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-01-18 14:21:19,859 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1787791666, now seen corresponding path program 110 times [2022-01-18 14:21:19,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517113745] [2022-01-18 14:21:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:19,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:19,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:19,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517113745] [2022-01-18 14:21:19,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517113745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:19,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305638561] [2022-01-18 14:21:19,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:19,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:19,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:19,964 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:19,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 14:21:19,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:19,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:20,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:20,141 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:20,142 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 15 [2022-01-18 14:21:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:20,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305638561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:20,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:20,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:20,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69699583] [2022-01-18 14:21:20,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:20,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:20,264 INFO L87 Difference]: Start difference. First operand 34123 states and 87359 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:20,759 INFO L93 Difference]: Finished difference Result 35999 states and 91258 transitions. [2022-01-18 14:21:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:20,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:20,819 INFO L225 Difference]: With dead ends: 35999 [2022-01-18 14:21:20,819 INFO L226 Difference]: Without dead ends: 35963 [2022-01-18 14:21:20,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:20,819 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 124 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:20,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 415 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:21:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35963 states. [2022-01-18 14:21:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35963 to 33896. [2022-01-18 14:21:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33896 states, 33895 states have (on average 2.559876087918572) internal successors, (86767), 33895 states have internal predecessors, (86767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33896 states to 33896 states and 86767 transitions. [2022-01-18 14:21:21,593 INFO L78 Accepts]: Start accepts. Automaton has 33896 states and 86767 transitions. Word has length 53 [2022-01-18 14:21:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:21,593 INFO L470 AbstractCegarLoop]: Abstraction has 33896 states and 86767 transitions. [2022-01-18 14:21:21,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33896 states and 86767 transitions. [2022-01-18 14:21:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:21,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:21,619 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:21,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 14:21:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-01-18 14:21:21,819 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -365258296, now seen corresponding path program 111 times [2022-01-18 14:21:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664809593] [2022-01-18 14:21:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:21,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:21,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664809593] [2022-01-18 14:21:21,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664809593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:21,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997145131] [2022-01-18 14:21:21,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:21,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:21,953 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:21,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 14:21:21,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 14:21:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:22,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:22,150 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:22,150 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 20 treesize of output 19 [2022-01-18 14:21:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:22,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997145131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:22,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:22,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:21:22,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547733652] [2022-01-18 14:21:22,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:22,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:21:22,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:21:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:21:22,281 INFO L87 Difference]: Start difference. First operand 33896 states and 86767 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:22,845 INFO L93 Difference]: Finished difference Result 37797 states and 95299 transitions. [2022-01-18 14:21:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:21:22,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:22,905 INFO L225 Difference]: With dead ends: 37797 [2022-01-18 14:21:22,905 INFO L226 Difference]: Without dead ends: 37785 [2022-01-18 14:21:22,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:21:22,906 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 145 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:22,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 466 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37785 states. [2022-01-18 14:21:23,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37785 to 33938. [2022-01-18 14:21:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33938 states, 33937 states have (on average 2.559978784217815) internal successors, (86878), 33937 states have internal predecessors, (86878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33938 states to 33938 states and 86878 transitions. [2022-01-18 14:21:23,777 INFO L78 Accepts]: Start accepts. Automaton has 33938 states and 86878 transitions. Word has length 53 [2022-01-18 14:21:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:23,777 INFO L470 AbstractCegarLoop]: Abstraction has 33938 states and 86878 transitions. [2022-01-18 14:21:23,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 33938 states and 86878 transitions. [2022-01-18 14:21:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:23,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:23,824 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:23,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 14:21:24,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 14:21:24,031 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1975891952, now seen corresponding path program 56 times [2022-01-18 14:21:24,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556309143] [2022-01-18 14:21:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:24,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:24,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556309143] [2022-01-18 14:21:24,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556309143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761463034] [2022-01-18 14:21:24,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:24,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:24,127 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:24,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 14:21:24,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:24,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:24,300 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:24,300 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 15 [2022-01-18 14:21:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:24,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761463034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:24,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:24,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:24,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570876480] [2022-01-18 14:21:24,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:24,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:24,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:24,416 INFO L87 Difference]: Start difference. First operand 33938 states and 86878 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:25,079 INFO L93 Difference]: Finished difference Result 36071 states and 91355 transitions. [2022-01-18 14:21:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:25,137 INFO L225 Difference]: With dead ends: 36071 [2022-01-18 14:21:25,137 INFO L226 Difference]: Without dead ends: 36028 [2022-01-18 14:21:25,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:25,138 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:25,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 459 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36028 states. [2022-01-18 14:21:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36028 to 33966. [2022-01-18 14:21:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33966 states, 33965 states have (on average 2.5602826438981303) internal successors, (86960), 33965 states have internal predecessors, (86960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33966 states to 33966 states and 86960 transitions. [2022-01-18 14:21:25,745 INFO L78 Accepts]: Start accepts. Automaton has 33966 states and 86960 transitions. Word has length 53 [2022-01-18 14:21:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:25,745 INFO L470 AbstractCegarLoop]: Abstraction has 33966 states and 86960 transitions. [2022-01-18 14:21:25,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33966 states and 86960 transitions. [2022-01-18 14:21:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:25,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:25,771 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:25,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 14:21:25,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:25,971 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash -196861942, now seen corresponding path program 112 times [2022-01-18 14:21:25,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:25,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050905398] [2022-01-18 14:21:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:25,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:26,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:26,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050905398] [2022-01-18 14:21:26,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050905398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:26,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051389533] [2022-01-18 14:21:26,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:21:26,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:26,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:26,072 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:26,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 14:21:26,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:21:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:26,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:26,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:26,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:26,252 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 15 [2022-01-18 14:21:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:26,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051389533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:26,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:26,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-18 14:21:26,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495600092] [2022-01-18 14:21:26,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:26,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:26,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:26,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:26,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:26,476 INFO L87 Difference]: Start difference. First operand 33966 states and 86960 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:27,021 INFO L93 Difference]: Finished difference Result 34769 states and 88510 transitions. [2022-01-18 14:21:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:27,079 INFO L225 Difference]: With dead ends: 34769 [2022-01-18 14:21:27,079 INFO L226 Difference]: Without dead ends: 34701 [2022-01-18 14:21:27,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:27,080 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 114 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:27,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 425 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34701 states. [2022-01-18 14:21:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34701 to 34014. [2022-01-18 14:21:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34014 states, 34013 states have (on average 2.5586687443036484) internal successors, (87028), 34013 states have internal predecessors, (87028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34014 states to 34014 states and 87028 transitions. [2022-01-18 14:21:27,836 INFO L78 Accepts]: Start accepts. Automaton has 34014 states and 87028 transitions. Word has length 53 [2022-01-18 14:21:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:27,836 INFO L470 AbstractCegarLoop]: Abstraction has 34014 states and 87028 transitions. [2022-01-18 14:21:27,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 34014 states and 87028 transitions. [2022-01-18 14:21:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:27,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:27,863 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:27,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:28,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:28,063 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash -810398122, now seen corresponding path program 113 times [2022-01-18 14:21:28,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:28,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317844007] [2022-01-18 14:21:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:28,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:28,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317844007] [2022-01-18 14:21:28,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317844007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833940114] [2022-01-18 14:21:28,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:21:28,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:28,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:28,163 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:28,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 14:21:28,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 14:21:28,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:28,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:28,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:28,348 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:28,348 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 15 [2022-01-18 14:21:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833940114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:28,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:28,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:28,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892393827] [2022-01-18 14:21:28,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:28,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:28,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:28,474 INFO L87 Difference]: Start difference. First operand 34014 states and 87028 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:28,994 INFO L93 Difference]: Finished difference Result 36157 states and 91478 transitions. [2022-01-18 14:21:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:28,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:29,194 INFO L225 Difference]: With dead ends: 36157 [2022-01-18 14:21:29,194 INFO L226 Difference]: Without dead ends: 36109 [2022-01-18 14:21:29,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:29,194 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 145 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:29,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 417 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:29,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36109 states. [2022-01-18 14:21:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36109 to 33749. [2022-01-18 14:21:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33749 states, 33748 states have (on average 2.559677610525068) internal successors, (86384), 33748 states have internal predecessors, (86384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33749 states to 33749 states and 86384 transitions. [2022-01-18 14:21:29,902 INFO L78 Accepts]: Start accepts. Automaton has 33749 states and 86384 transitions. Word has length 53 [2022-01-18 14:21:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:29,903 INFO L470 AbstractCegarLoop]: Abstraction has 33749 states and 86384 transitions. [2022-01-18 14:21:29,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 33749 states and 86384 transitions. [2022-01-18 14:21:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:29,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:29,931 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:29,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:30,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-01-18 14:21:30,134 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash -935076116, now seen corresponding path program 114 times [2022-01-18 14:21:30,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:30,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611439329] [2022-01-18 14:21:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:30,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:30,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611439329] [2022-01-18 14:21:30,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611439329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854826032] [2022-01-18 14:21:30,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:21:30,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:30,231 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:30,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 14:21:30,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 14:21:30,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:30,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:21:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 41 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:30,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:30,732 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:30,732 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 15 [2022-01-18 14:21:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 95 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:30,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854826032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:30,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:30,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 26 [2022-01-18 14:21:30,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298667350] [2022-01-18 14:21:30,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:30,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:21:30,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:21:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:21:30,905 INFO L87 Difference]: Start difference. First operand 33749 states and 86384 transitions. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:35,108 INFO L93 Difference]: Finished difference Result 68924 states and 174961 transitions. [2022-01-18 14:21:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-18 14:21:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:35,237 INFO L225 Difference]: With dead ends: 68924 [2022-01-18 14:21:35,237 INFO L226 Difference]: Without dead ends: 68898 [2022-01-18 14:21:35,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 179 SyntacticMatches, 40 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14259 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4435, Invalid=20371, Unknown=0, NotChecked=0, Total=24806 [2022-01-18 14:21:35,239 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 691 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1282 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:35,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 1004 Invalid, 3489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2126 Invalid, 0 Unknown, 1282 Unchecked, 0.7s Time] [2022-01-18 14:21:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68898 states. [2022-01-18 14:21:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68898 to 36585. [2022-01-18 14:21:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36585 states, 36584 states have (on average 2.5490104963918654) internal successors, (93253), 36584 states have internal predecessors, (93253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36585 states to 36585 states and 93253 transitions. [2022-01-18 14:21:36,359 INFO L78 Accepts]: Start accepts. Automaton has 36585 states and 93253 transitions. Word has length 53 [2022-01-18 14:21:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 36585 states and 93253 transitions. [2022-01-18 14:21:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36585 states and 93253 transitions. [2022-01-18 14:21:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:36,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:36,386 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:36,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:36,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 14:21:36,586 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:36,587 INFO L85 PathProgramCache]: Analyzing trace with hash -310420104, now seen corresponding path program 115 times [2022-01-18 14:21:36,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:36,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10227631] [2022-01-18 14:21:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:36,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:36,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10227631] [2022-01-18 14:21:36,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10227631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853130732] [2022-01-18 14:21:36,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:21:36,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:36,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:36,681 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 14:21:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:36,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:36,868 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:36,868 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 20 treesize of output 19 [2022-01-18 14:21:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:36,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853130732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:36,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:36,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:21:36,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55406945] [2022-01-18 14:21:36,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:36,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:21:36,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:21:36,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:21:36,981 INFO L87 Difference]: Start difference. First operand 36585 states and 93253 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:37,816 INFO L93 Difference]: Finished difference Result 40804 states and 102537 transitions. [2022-01-18 14:21:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:21:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:37,880 INFO L225 Difference]: With dead ends: 40804 [2022-01-18 14:21:37,880 INFO L226 Difference]: Without dead ends: 40762 [2022-01-18 14:21:37,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:21:37,880 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 223 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:37,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 549 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40762 states. [2022-01-18 14:21:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40762 to 36523. [2022-01-18 14:21:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36523 states, 36522 states have (on average 2.5495044083018454) internal successors, (93113), 36522 states have internal predecessors, (93113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36523 states to 36523 states and 93113 transitions. [2022-01-18 14:21:38,801 INFO L78 Accepts]: Start accepts. Automaton has 36523 states and 93113 transitions. Word has length 53 [2022-01-18 14:21:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:38,802 INFO L470 AbstractCegarLoop]: Abstraction has 36523 states and 93113 transitions. [2022-01-18 14:21:38,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 36523 states and 93113 transitions. [2022-01-18 14:21:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:38,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:38,831 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:38,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:39,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:39,032 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1486355746, now seen corresponding path program 116 times [2022-01-18 14:21:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479522843] [2022-01-18 14:21:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:39,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:39,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479522843] [2022-01-18 14:21:39,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479522843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620617001] [2022-01-18 14:21:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:39,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:39,134 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:39,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 14:21:39,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:39,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:39,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:39,323 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:39,323 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 20 treesize of output 19 [2022-01-18 14:21:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:39,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620617001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:39,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:39,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:21:39,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235167364] [2022-01-18 14:21:39,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:39,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:21:39,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:21:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:21:39,433 INFO L87 Difference]: Start difference. First operand 36523 states and 93113 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:40,281 INFO L93 Difference]: Finished difference Result 41366 states and 103940 transitions. [2022-01-18 14:21:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:21:40,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:40,348 INFO L225 Difference]: With dead ends: 41366 [2022-01-18 14:21:40,348 INFO L226 Difference]: Without dead ends: 41312 [2022-01-18 14:21:40,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:21:40,349 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 206 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:40,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 551 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41312 states. [2022-01-18 14:21:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41312 to 36458. [2022-01-18 14:21:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36458 states, 36457 states have (on average 2.549222371561017) internal successors, (92937), 36457 states have internal predecessors, (92937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36458 states to 36458 states and 92937 transitions. [2022-01-18 14:21:41,033 INFO L78 Accepts]: Start accepts. Automaton has 36458 states and 92937 transitions. Word has length 53 [2022-01-18 14:21:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:41,033 INFO L470 AbstractCegarLoop]: Abstraction has 36458 states and 92937 transitions. [2022-01-18 14:21:41,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 36458 states and 92937 transitions. [2022-01-18 14:21:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:41,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:41,061 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:41,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:41,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 14:21:41,262 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:41,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:41,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1090441140, now seen corresponding path program 57 times [2022-01-18 14:21:41,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:41,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363587884] [2022-01-18 14:21:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:41,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:41,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363587884] [2022-01-18 14:21:41,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363587884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417437274] [2022-01-18 14:21:41,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:41,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:41,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:41,531 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:41,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 14:21:41,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-18 14:21:41,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:41,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:41,752 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:41,752 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 15 [2022-01-18 14:21:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:41,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417437274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:41,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995291772] [2022-01-18 14:21:41,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:41,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:41,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:41,875 INFO L87 Difference]: Start difference. First operand 36458 states and 92937 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:42,396 INFO L93 Difference]: Finished difference Result 38744 states and 97778 transitions. [2022-01-18 14:21:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:42,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:42,462 INFO L225 Difference]: With dead ends: 38744 [2022-01-18 14:21:42,462 INFO L226 Difference]: Without dead ends: 38709 [2022-01-18 14:21:42,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:42,462 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 182 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:42,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 411 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:21:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38709 states. [2022-01-18 14:21:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38709 to 36349. [2022-01-18 14:21:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36349 states, 36348 states have (on average 2.549576317816661) internal successors, (92672), 36348 states have internal predecessors, (92672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36349 states to 36349 states and 92672 transitions. [2022-01-18 14:21:43,350 INFO L78 Accepts]: Start accepts. Automaton has 36349 states and 92672 transitions. Word has length 53 [2022-01-18 14:21:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:43,350 INFO L470 AbstractCegarLoop]: Abstraction has 36349 states and 92672 transitions. [2022-01-18 14:21:43,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 36349 states and 92672 transitions. [2022-01-18 14:21:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:43,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:43,377 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:43,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 14:21:43,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 14:21:43,578 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1031772262, now seen corresponding path program 117 times [2022-01-18 14:21:43,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891809963] [2022-01-18 14:21:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:43,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:43,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891809963] [2022-01-18 14:21:43,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891809963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295315951] [2022-01-18 14:21:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:43,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:43,670 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:43,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 14:21:43,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-18 14:21:43,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:43,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:43,854 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:43,854 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 15 [2022-01-18 14:21:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:43,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295315951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:43,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:43,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-18 14:21:43,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086003263] [2022-01-18 14:21:43,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:43,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:43,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:43,971 INFO L87 Difference]: Start difference. First operand 36349 states and 92672 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:44,558 INFO L93 Difference]: Finished difference Result 37190 states and 94326 transitions. [2022-01-18 14:21:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:44,622 INFO L225 Difference]: With dead ends: 37190 [2022-01-18 14:21:44,622 INFO L226 Difference]: Without dead ends: 37104 [2022-01-18 14:21:44,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:44,622 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 113 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:44,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 467 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37104 states. [2022-01-18 14:21:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37104 to 36421. [2022-01-18 14:21:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36421 states, 36420 states have (on average 2.547638660076881) internal successors, (92785), 36420 states have internal predecessors, (92785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36421 states to 36421 states and 92785 transitions. [2022-01-18 14:21:45,436 INFO L78 Accepts]: Start accepts. Automaton has 36421 states and 92785 transitions. Word has length 53 [2022-01-18 14:21:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:45,436 INFO L470 AbstractCegarLoop]: Abstraction has 36421 states and 92785 transitions. [2022-01-18 14:21:45,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 36421 states and 92785 transitions. [2022-01-18 14:21:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:45,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:45,464 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:45,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 14:21:45,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-01-18 14:21:45,664 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash 418236082, now seen corresponding path program 118 times [2022-01-18 14:21:45,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:45,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979338768] [2022-01-18 14:21:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:45,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:45,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:45,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979338768] [2022-01-18 14:21:45,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979338768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:45,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696062192] [2022-01-18 14:21:45,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:21:45,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:45,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:45,764 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:45,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 14:21:45,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:21:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:45,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:45,943 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:45,943 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 15 [2022-01-18 14:21:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:46,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696062192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:46,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:46,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:46,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853824414] [2022-01-18 14:21:46,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:46,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:46,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:46,068 INFO L87 Difference]: Start difference. First operand 36421 states and 92785 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:46,595 INFO L93 Difference]: Finished difference Result 38842 states and 97828 transitions. [2022-01-18 14:21:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:46,665 INFO L225 Difference]: With dead ends: 38842 [2022-01-18 14:21:46,665 INFO L226 Difference]: Without dead ends: 38782 [2022-01-18 14:21:46,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:46,665 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 154 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:46,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 433 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38782 states. [2022-01-18 14:21:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38782 to 36258. [2022-01-18 14:21:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36258 states, 36257 states have (on average 2.5473977438839395) internal successors, (92361), 36257 states have internal predecessors, (92361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36258 states to 36258 states and 92361 transitions. [2022-01-18 14:21:47,633 INFO L78 Accepts]: Start accepts. Automaton has 36258 states and 92361 transitions. Word has length 53 [2022-01-18 14:21:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 36258 states and 92361 transitions. [2022-01-18 14:21:47,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 36258 states and 92361 transitions. [2022-01-18 14:21:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:47,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:47,661 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:47,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-18 14:21:47,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:47,861 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:47,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1734813880, now seen corresponding path program 119 times [2022-01-18 14:21:47,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:47,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200498641] [2022-01-18 14:21:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:47,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:47,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200498641] [2022-01-18 14:21:47,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200498641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894889495] [2022-01-18 14:21:47,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:21:47,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:47,957 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:47,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 14:21:47,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 14:21:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:48,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:48,149 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:48,149 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 20 treesize of output 19 [2022-01-18 14:21:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894889495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:48,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:48,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:21:48,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858302860] [2022-01-18 14:21:48,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:48,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:21:48,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:21:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:21:48,268 INFO L87 Difference]: Start difference. First operand 36258 states and 92361 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:48,955 INFO L93 Difference]: Finished difference Result 40819 states and 102351 transitions. [2022-01-18 14:21:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:21:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:49,022 INFO L225 Difference]: With dead ends: 40819 [2022-01-18 14:21:49,022 INFO L226 Difference]: Without dead ends: 40765 [2022-01-18 14:21:49,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:21:49,022 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 268 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:49,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 577 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40765 states. [2022-01-18 14:21:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40765 to 36274. [2022-01-18 14:21:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36274 states, 36273 states have (on average 2.547431974195683) internal successors, (92403), 36273 states have internal predecessors, (92403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36274 states to 36274 states and 92403 transitions. [2022-01-18 14:21:49,938 INFO L78 Accepts]: Start accepts. Automaton has 36274 states and 92403 transitions. Word has length 53 [2022-01-18 14:21:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:49,938 INFO L470 AbstractCegarLoop]: Abstraction has 36274 states and 92403 transitions. [2022-01-18 14:21:49,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 36274 states and 92403 transitions. [2022-01-18 14:21:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:49,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:49,966 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:49,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 14:21:50,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 14:21:50,167 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1579977346, now seen corresponding path program 120 times [2022-01-18 14:21:50,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:50,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922887989] [2022-01-18 14:21:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:50,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:50,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922887989] [2022-01-18 14:21:50,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922887989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143007089] [2022-01-18 14:21:50,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:21:50,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:50,274 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:50,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 14:21:50,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 14:21:50,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:50,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:50,472 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:50,472 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 20 treesize of output 19 [2022-01-18 14:21:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:50,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143007089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:50,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:50,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:21:50,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477131772] [2022-01-18 14:21:50,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:50,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:21:50,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:21:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:21:50,586 INFO L87 Difference]: Start difference. First operand 36274 states and 92403 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:51,448 INFO L93 Difference]: Finished difference Result 44074 states and 109960 transitions. [2022-01-18 14:21:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:21:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:51,525 INFO L225 Difference]: With dead ends: 44074 [2022-01-18 14:21:51,525 INFO L226 Difference]: Without dead ends: 43960 [2022-01-18 14:21:51,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:21:51,526 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 449 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:51,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 579 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43960 states. [2022-01-18 14:21:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43960 to 36387. [2022-01-18 14:21:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36387 states, 36386 states have (on average 2.548562633980102) internal successors, (92732), 36386 states have internal predecessors, (92732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36387 states to 36387 states and 92732 transitions. [2022-01-18 14:21:52,369 INFO L78 Accepts]: Start accepts. Automaton has 36387 states and 92732 transitions. Word has length 53 [2022-01-18 14:21:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 36387 states and 92732 transitions. [2022-01-18 14:21:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 36387 states and 92732 transitions. [2022-01-18 14:21:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:52,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:52,397 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:52,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-01-18 14:21:52,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:52,597 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1639668856, now seen corresponding path program 121 times [2022-01-18 14:21:52,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:52,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155034507] [2022-01-18 14:21:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:52,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:52,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155034507] [2022-01-18 14:21:52,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155034507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578692141] [2022-01-18 14:21:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:21:52,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:52,705 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:52,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 14:21:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:52,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:53,027 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:21:53,027 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 20 treesize of output 19 [2022-01-18 14:21:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:53,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578692141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:53,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:53,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:21:53,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833433301] [2022-01-18 14:21:53,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:53,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:21:53,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:21:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:21:53,126 INFO L87 Difference]: Start difference. First operand 36387 states and 92732 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:53,803 INFO L93 Difference]: Finished difference Result 42403 states and 106254 transitions. [2022-01-18 14:21:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:21:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:53,877 INFO L225 Difference]: With dead ends: 42403 [2022-01-18 14:21:53,877 INFO L226 Difference]: Without dead ends: 42247 [2022-01-18 14:21:53,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:21:53,877 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 275 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:53,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 530 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42247 states. [2022-01-18 14:21:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42247 to 36245. [2022-01-18 14:21:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36245 states, 36244 states have (on average 2.5455247765147333) internal successors, (92260), 36244 states have internal predecessors, (92260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36245 states to 36245 states and 92260 transitions. [2022-01-18 14:21:54,628 INFO L78 Accepts]: Start accepts. Automaton has 36245 states and 92260 transitions. Word has length 53 [2022-01-18 14:21:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:54,628 INFO L470 AbstractCegarLoop]: Abstraction has 36245 states and 92260 transitions. [2022-01-18 14:21:54,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 36245 states and 92260 transitions. [2022-01-18 14:21:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:54,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:54,656 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:54,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 14:21:54,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:54,856 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1562047114, now seen corresponding path program 122 times [2022-01-18 14:21:54,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:54,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129876654] [2022-01-18 14:21:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:54,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:54,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129876654] [2022-01-18 14:21:54,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129876654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814741471] [2022-01-18 14:21:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:21:54,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:54,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:54,975 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:54,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 14:21:54,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:21:54,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:55,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:55,157 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:55,158 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 15 [2022-01-18 14:21:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814741471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:55,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:55,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-18 14:21:55,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402128817] [2022-01-18 14:21:55,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:55,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:55,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:55,274 INFO L87 Difference]: Start difference. First operand 36245 states and 92260 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:56,035 INFO L93 Difference]: Finished difference Result 37813 states and 95466 transitions. [2022-01-18 14:21:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:56,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:56,102 INFO L225 Difference]: With dead ends: 37813 [2022-01-18 14:21:56,102 INFO L226 Difference]: Without dead ends: 37584 [2022-01-18 14:21:56,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:56,102 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 111 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:56,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 508 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:21:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37584 states. [2022-01-18 14:21:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37584 to 36450. [2022-01-18 14:21:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36450 states, 36449 states have (on average 2.542922988285001) internal successors, (92687), 36449 states have internal predecessors, (92687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36450 states to 36450 states and 92687 transitions. [2022-01-18 14:21:57,030 INFO L78 Accepts]: Start accepts. Automaton has 36450 states and 92687 transitions. Word has length 53 [2022-01-18 14:21:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:57,030 INFO L470 AbstractCegarLoop]: Abstraction has 36450 states and 92687 transitions. [2022-01-18 14:21:57,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36450 states and 92687 transitions. [2022-01-18 14:21:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:57,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:57,058 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:57,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-18 14:21:57,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:57,259 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash 948510934, now seen corresponding path program 123 times [2022-01-18 14:21:57,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769037301] [2022-01-18 14:21:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:57,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:57,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769037301] [2022-01-18 14:21:57,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769037301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755980934] [2022-01-18 14:21:57,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:21:57,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:57,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:57,353 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:57,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 14:21:57,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-01-18 14:21:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:57,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:21:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:57,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:57,527 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:21:57,527 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 15 [2022-01-18 14:21:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:21:57,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755980934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:57,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:57,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:21:57,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475135381] [2022-01-18 14:21:57,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:57,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:21:57,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:21:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:21:57,644 INFO L87 Difference]: Start difference. First operand 36450 states and 92687 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:21:58,159 INFO L93 Difference]: Finished difference Result 38975 states and 97929 transitions. [2022-01-18 14:21:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:21:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:21:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:21:58,223 INFO L225 Difference]: With dead ends: 38975 [2022-01-18 14:21:58,224 INFO L226 Difference]: Without dead ends: 38918 [2022-01-18 14:21:58,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:21:58,224 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 176 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:21:58,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 459 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:21:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38918 states. [2022-01-18 14:21:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38918 to 36510. [2022-01-18 14:21:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36510 states, 36509 states have (on average 2.5426333232901475) internal successors, (92829), 36509 states have internal predecessors, (92829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36510 states to 36510 states and 92829 transitions. [2022-01-18 14:21:58,971 INFO L78 Accepts]: Start accepts. Automaton has 36510 states and 92829 transitions. Word has length 53 [2022-01-18 14:21:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:21:58,971 INFO L470 AbstractCegarLoop]: Abstraction has 36510 states and 92829 transitions. [2022-01-18 14:21:58,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:21:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 36510 states and 92829 transitions. [2022-01-18 14:21:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:21:58,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:21:58,998 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:21:59,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 14:21:59,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:59,199 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:21:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:21:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash -699846569, now seen corresponding path program 124 times [2022-01-18 14:21:59,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:21:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536872122] [2022-01-18 14:21:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:21:59,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:21:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:21:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:21:59,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:21:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536872122] [2022-01-18 14:21:59,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536872122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:21:59,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401422069] [2022-01-18 14:21:59,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:21:59,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:21:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:21:59,290 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:21:59,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 14:21:59,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:21:59,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:21:59,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:21:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:21:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 94 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:59,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:21:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 94 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:21:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401422069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:21:59,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:21:59,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 13 [2022-01-18 14:21:59,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419554123] [2022-01-18 14:21:59,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:21:59,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:21:59,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:21:59,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:21:59,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:21:59,697 INFO L87 Difference]: Start difference. First operand 36510 states and 92829 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:00,032 INFO L93 Difference]: Finished difference Result 41389 states and 103877 transitions. [2022-01-18 14:22:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:22:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:00,280 INFO L225 Difference]: With dead ends: 41389 [2022-01-18 14:22:00,281 INFO L226 Difference]: Without dead ends: 41329 [2022-01-18 14:22:00,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:22:00,281 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 207 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:00,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 143 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:22:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41329 states. [2022-01-18 14:22:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41329 to 37578. [2022-01-18 14:22:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37578 states, 37577 states have (on average 2.5463448385980785) internal successors, (95684), 37577 states have internal predecessors, (95684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37578 states to 37578 states and 95684 transitions. [2022-01-18 14:22:01,076 INFO L78 Accepts]: Start accepts. Automaton has 37578 states and 95684 transitions. Word has length 53 [2022-01-18 14:22:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:01,076 INFO L470 AbstractCegarLoop]: Abstraction has 37578 states and 95684 transitions. [2022-01-18 14:22:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 37578 states and 95684 transitions. [2022-01-18 14:22:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:01,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:01,105 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:01,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 14:22:01,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:01,306 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1204539028, now seen corresponding path program 125 times [2022-01-18 14:22:01,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:01,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808297805] [2022-01-18 14:22:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:01,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:01,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:01,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808297805] [2022-01-18 14:22:01,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808297805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:01,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680967818] [2022-01-18 14:22:01,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:22:01,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:01,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:01,405 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:01,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 14:22:01,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 14:22:01,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:01,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:01,602 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:01,603 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 20 treesize of output 19 [2022-01-18 14:22:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:01,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680967818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:01,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:01,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:22:01,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790869884] [2022-01-18 14:22:01,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:01,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:22:01,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:22:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:22:01,725 INFO L87 Difference]: Start difference. First operand 37578 states and 95684 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:02,451 INFO L93 Difference]: Finished difference Result 42938 states and 107560 transitions. [2022-01-18 14:22:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:22:02,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:02,529 INFO L225 Difference]: With dead ends: 42938 [2022-01-18 14:22:02,530 INFO L226 Difference]: Without dead ends: 42884 [2022-01-18 14:22:02,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:22:02,530 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 306 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:02,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 582 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:22:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42884 states. [2022-01-18 14:22:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42884 to 38036. [2022-01-18 14:22:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38036 states, 38035 states have (on average 2.5473642697515446) internal successors, (96889), 38035 states have internal predecessors, (96889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38036 states to 38036 states and 96889 transitions. [2022-01-18 14:22:03,410 INFO L78 Accepts]: Start accepts. Automaton has 38036 states and 96889 transitions. Word has length 53 [2022-01-18 14:22:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:03,410 INFO L470 AbstractCegarLoop]: Abstraction has 38036 states and 96889 transitions. [2022-01-18 14:22:03,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 38036 states and 96889 transitions. [2022-01-18 14:22:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:03,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:03,437 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:03,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:03,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 14:22:03,637 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:03,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1049702494, now seen corresponding path program 126 times [2022-01-18 14:22:03,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:03,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043146929] [2022-01-18 14:22:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:03,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:03,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:03,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043146929] [2022-01-18 14:22:03,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043146929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:03,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447573378] [2022-01-18 14:22:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:22:03,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:03,742 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:03,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 14:22:03,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-18 14:22:03,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:03,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:03,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:03,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:03,926 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:03,927 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 20 treesize of output 19 [2022-01-18 14:22:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:04,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447573378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:04,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:04,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:22:04,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528659854] [2022-01-18 14:22:04,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:04,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:22:04,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:22:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:22:04,032 INFO L87 Difference]: Start difference. First operand 38036 states and 96889 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:05,092 INFO L93 Difference]: Finished difference Result 49455 states and 123137 transitions. [2022-01-18 14:22:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 14:22:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:05,180 INFO L225 Difference]: With dead ends: 49455 [2022-01-18 14:22:05,181 INFO L226 Difference]: Without dead ends: 49275 [2022-01-18 14:22:05,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:22:05,181 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 564 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:05,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 665 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:22:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49275 states. [2022-01-18 14:22:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49275 to 39022. [2022-01-18 14:22:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39022 states, 39021 states have (on average 2.5514466569283205) internal successors, (99560), 39021 states have internal predecessors, (99560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39022 states to 39022 states and 99560 transitions. [2022-01-18 14:22:06,045 INFO L78 Accepts]: Start accepts. Automaton has 39022 states and 99560 transitions. Word has length 53 [2022-01-18 14:22:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:06,045 INFO L470 AbstractCegarLoop]: Abstraction has 39022 states and 99560 transitions. [2022-01-18 14:22:06,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 39022 states and 99560 transitions. [2022-01-18 14:22:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:06,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:06,074 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:06,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 14:22:06,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 14:22:06,274 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -663099817, now seen corresponding path program 127 times [2022-01-18 14:22:06,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547929380] [2022-01-18 14:22:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:06,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:06,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:06,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547929380] [2022-01-18 14:22:06,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547929380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:06,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674630347] [2022-01-18 14:22:06,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:22:06,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:06,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:06,379 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:06,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 14:22:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:06,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:06,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674630347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:06,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:06,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 15 [2022-01-18 14:22:06,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302156389] [2022-01-18 14:22:06,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:06,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:22:06,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:22:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:22:06,780 INFO L87 Difference]: Start difference. First operand 39022 states and 99560 transitions. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:07,157 INFO L93 Difference]: Finished difference Result 43105 states and 107920 transitions. [2022-01-18 14:22:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:22:07,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:07,227 INFO L225 Difference]: With dead ends: 43105 [2022-01-18 14:22:07,227 INFO L226 Difference]: Without dead ends: 43033 [2022-01-18 14:22:07,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:22:07,227 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:07,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 168 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:22:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43033 states. [2022-01-18 14:22:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43033 to 37869. [2022-01-18 14:22:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37869 states, 37868 states have (on average 2.5430442590049647) internal successors, (96300), 37868 states have internal predecessors, (96300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37869 states to 37869 states and 96300 transitions. [2022-01-18 14:22:08,182 INFO L78 Accepts]: Start accepts. Automaton has 37869 states and 96300 transitions. Word has length 53 [2022-01-18 14:22:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:08,182 INFO L470 AbstractCegarLoop]: Abstraction has 37869 states and 96300 transitions. [2022-01-18 14:22:08,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37869 states and 96300 transitions. [2022-01-18 14:22:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:08,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:08,210 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:08,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 14:22:08,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 14:22:08,410 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1109394004, now seen corresponding path program 128 times [2022-01-18 14:22:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547604075] [2022-01-18 14:22:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:08,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:08,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:08,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547604075] [2022-01-18 14:22:08,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547604075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:08,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511536085] [2022-01-18 14:22:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:08,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:08,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:08,528 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:08,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 14:22:08,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:08,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:08,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:08,716 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:08,717 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 20 treesize of output 19 [2022-01-18 14:22:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:08,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511536085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:08,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:08,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:22:08,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617722823] [2022-01-18 14:22:08,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:08,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:22:08,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:22:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:22:08,956 INFO L87 Difference]: Start difference. First operand 37869 states and 96300 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:10,209 INFO L93 Difference]: Finished difference Result 55701 states and 138590 transitions. [2022-01-18 14:22:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 14:22:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:10,312 INFO L225 Difference]: With dead ends: 55701 [2022-01-18 14:22:10,313 INFO L226 Difference]: Without dead ends: 55425 [2022-01-18 14:22:10,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 14:22:10,313 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 829 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:10,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 695 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:22:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55425 states. [2022-01-18 14:22:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55425 to 39348. [2022-01-18 14:22:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39348 states, 39347 states have (on average 2.5522657381757186) internal successors, (100424), 39347 states have internal predecessors, (100424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39348 states to 39348 states and 100424 transitions. [2022-01-18 14:22:11,242 INFO L78 Accepts]: Start accepts. Automaton has 39348 states and 100424 transitions. Word has length 53 [2022-01-18 14:22:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:11,242 INFO L470 AbstractCegarLoop]: Abstraction has 39348 states and 100424 transitions. [2022-01-18 14:22:11,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 39348 states and 100424 transitions. [2022-01-18 14:22:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:11,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:11,274 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:11,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:11,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:11,474 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1262707870, now seen corresponding path program 129 times [2022-01-18 14:22:11,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:11,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929283867] [2022-01-18 14:22:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:11,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:11,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:11,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929283867] [2022-01-18 14:22:11,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929283867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:11,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839374582] [2022-01-18 14:22:11,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:22:11,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:11,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:11,591 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:11,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 14:22:11,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-18 14:22:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:11,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:11,783 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:11,783 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 20 treesize of output 19 [2022-01-18 14:22:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839374582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:11,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:11,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:22:11,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910623826] [2022-01-18 14:22:11,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:11,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:22:11,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:22:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:22:11,871 INFO L87 Difference]: Start difference. First operand 39348 states and 100424 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:12,760 INFO L93 Difference]: Finished difference Result 48858 states and 122106 transitions. [2022-01-18 14:22:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:22:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:12,834 INFO L225 Difference]: With dead ends: 48858 [2022-01-18 14:22:12,834 INFO L226 Difference]: Without dead ends: 48429 [2022-01-18 14:22:12,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:22:12,834 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 330 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:12,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 584 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:22:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48429 states. [2022-01-18 14:22:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48429 to 37192. [2022-01-18 14:22:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37192 states, 37191 states have (on average 2.5306929095748973) internal successors, (94119), 37191 states have internal predecessors, (94119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37192 states to 37192 states and 94119 transitions. [2022-01-18 14:22:13,728 INFO L78 Accepts]: Start accepts. Automaton has 37192 states and 94119 transitions. Word has length 53 [2022-01-18 14:22:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:13,728 INFO L470 AbstractCegarLoop]: Abstraction has 37192 states and 94119 transitions. [2022-01-18 14:22:13,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 37192 states and 94119 transitions. [2022-01-18 14:22:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:13,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:13,757 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:13,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-18 14:22:13,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-18 14:22:13,958 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2122649797, now seen corresponding path program 58 times [2022-01-18 14:22:13,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:13,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965255659] [2022-01-18 14:22:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:13,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:14,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:14,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965255659] [2022-01-18 14:22:14,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965255659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:14,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265252604] [2022-01-18 14:22:14,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:22:14,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:14,076 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:14,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 14:22:14,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:22:14,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:14,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:14,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265252604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:14,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:14,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-01-18 14:22:14,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479301472] [2022-01-18 14:22:14,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:14,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:22:14,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:22:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:22:14,496 INFO L87 Difference]: Start difference. First operand 37192 states and 94119 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:15,054 INFO L93 Difference]: Finished difference Result 53262 states and 132679 transitions. [2022-01-18 14:22:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:22:15,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:15,159 INFO L225 Difference]: With dead ends: 53262 [2022-01-18 14:22:15,159 INFO L226 Difference]: Without dead ends: 53262 [2022-01-18 14:22:15,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=599, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:22:15,160 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 426 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:15,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 173 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:22:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53262 states. [2022-01-18 14:22:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53262 to 40380. [2022-01-18 14:22:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40380 states, 40379 states have (on average 2.5569231531241488) internal successors, (103246), 40379 states have internal predecessors, (103246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40380 states to 40380 states and 103246 transitions. [2022-01-18 14:22:16,125 INFO L78 Accepts]: Start accepts. Automaton has 40380 states and 103246 transitions. Word has length 53 [2022-01-18 14:22:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:16,126 INFO L470 AbstractCegarLoop]: Abstraction has 40380 states and 103246 transitions. [2022-01-18 14:22:16,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 40380 states and 103246 transitions. [2022-01-18 14:22:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:16,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:16,157 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:16,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 14:22:16,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 14:22:16,358 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1155250121, now seen corresponding path program 59 times [2022-01-18 14:22:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:16,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715109867] [2022-01-18 14:22:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:16,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 86 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:16,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715109867] [2022-01-18 14:22:16,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715109867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498465297] [2022-01-18 14:22:16,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:22:16,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:16,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:16,462 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:16,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 14:22:16,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 14:22:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:16,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:16,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:17,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498465297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:17,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:17,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 28 [2022-01-18 14:22:17,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355737070] [2022-01-18 14:22:17,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:17,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:22:17,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:22:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:22:17,175 INFO L87 Difference]: Start difference. First operand 40380 states and 103246 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:18,064 INFO L93 Difference]: Finished difference Result 55872 states and 140775 transitions. [2022-01-18 14:22:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 14:22:18,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:18,167 INFO L225 Difference]: With dead ends: 55872 [2022-01-18 14:22:18,167 INFO L226 Difference]: Without dead ends: 55872 [2022-01-18 14:22:18,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=909, Invalid=1953, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 14:22:18,168 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 609 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:18,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 261 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:22:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55872 states. [2022-01-18 14:22:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55872 to 42960. [2022-01-18 14:22:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42960 states, 42959 states have (on average 2.571312181382248) internal successors, (110461), 42959 states have internal predecessors, (110461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42960 states to 42960 states and 110461 transitions. [2022-01-18 14:22:19,143 INFO L78 Accepts]: Start accepts. Automaton has 42960 states and 110461 transitions. Word has length 53 [2022-01-18 14:22:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:19,143 INFO L470 AbstractCegarLoop]: Abstraction has 42960 states and 110461 transitions. [2022-01-18 14:22:19,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 42960 states and 110461 transitions. [2022-01-18 14:22:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:19,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:19,175 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:19,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 14:22:19,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-01-18 14:22:19,376 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1174674761, now seen corresponding path program 60 times [2022-01-18 14:22:19,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:19,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81451804] [2022-01-18 14:22:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:19,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:19,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81451804] [2022-01-18 14:22:19,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81451804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044000941] [2022-01-18 14:22:19,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:22:19,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:19,504 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:19,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 14:22:19,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-18 14:22:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:19,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:19,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044000941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:19,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:19,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 19 [2022-01-18 14:22:19,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983870599] [2022-01-18 14:22:19,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:19,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:22:19,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:22:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:22:19,961 INFO L87 Difference]: Start difference. First operand 42960 states and 110461 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:20,734 INFO L93 Difference]: Finished difference Result 47816 states and 120907 transitions. [2022-01-18 14:22:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:22:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:20,818 INFO L225 Difference]: With dead ends: 47816 [2022-01-18 14:22:20,819 INFO L226 Difference]: Without dead ends: 47816 [2022-01-18 14:22:20,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:22:20,819 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 374 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:20,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 255 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:22:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47816 states. [2022-01-18 14:22:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47816 to 39063. [2022-01-18 14:22:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39063 states, 39062 states have (on average 2.5502790435717575) internal successors, (99619), 39062 states have internal predecessors, (99619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39063 states to 39063 states and 99619 transitions. [2022-01-18 14:22:21,822 INFO L78 Accepts]: Start accepts. Automaton has 39063 states and 99619 transitions. Word has length 53 [2022-01-18 14:22:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:21,822 INFO L470 AbstractCegarLoop]: Abstraction has 39063 states and 99619 transitions. [2022-01-18 14:22:21,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39063 states and 99619 transitions. [2022-01-18 14:22:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:21,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:21,851 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:21,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-18 14:22:22,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:22,051 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -513290217, now seen corresponding path program 130 times [2022-01-18 14:22:22,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804312277] [2022-01-18 14:22:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:22,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:22:22,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:22,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804312277] [2022-01-18 14:22:22,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804312277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:22,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866186063] [2022-01-18 14:22:22,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:22:22,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:22,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:22,177 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:22,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 14:22:22,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:22:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:22,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:22,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:22,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866186063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:22,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:22,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 17 [2022-01-18 14:22:22,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683718662] [2022-01-18 14:22:22,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:22,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:22:22,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:22:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:22:22,582 INFO L87 Difference]: Start difference. First operand 39063 states and 99619 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:22,972 INFO L93 Difference]: Finished difference Result 42644 states and 107063 transitions. [2022-01-18 14:22:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:22:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:23,044 INFO L225 Difference]: With dead ends: 42644 [2022-01-18 14:22:23,044 INFO L226 Difference]: Without dead ends: 42548 [2022-01-18 14:22:23,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:22:23,044 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 274 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:23,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 148 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:22:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42548 states. [2022-01-18 14:22:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42548 to 39328. [2022-01-18 14:22:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39328 states, 39327 states have (on average 2.545248811249269) internal successors, (100097), 39327 states have internal predecessors, (100097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39328 states to 39328 states and 100097 transitions. [2022-01-18 14:22:23,909 INFO L78 Accepts]: Start accepts. Automaton has 39328 states and 100097 transitions. Word has length 53 [2022-01-18 14:22:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:23,909 INFO L470 AbstractCegarLoop]: Abstraction has 39328 states and 100097 transitions. [2022-01-18 14:22:23,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 39328 states and 100097 transitions. [2022-01-18 14:22:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:23,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:23,936 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:23,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-18 14:22:24,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:24,136 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:24,137 INFO L85 PathProgramCache]: Analyzing trace with hash 828176883, now seen corresponding path program 131 times [2022-01-18 14:22:24,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:24,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558521682] [2022-01-18 14:22:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:24,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:24,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:24,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558521682] [2022-01-18 14:22:24,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558521682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:24,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089062517] [2022-01-18 14:22:24,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:22:24,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:24,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:24,226 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:24,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 14:22:24,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 14:22:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:22:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:24,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:24,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089062517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:24,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:24,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 16 [2022-01-18 14:22:24,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713468398] [2022-01-18 14:22:24,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:24,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:22:24,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:22:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:22:24,653 INFO L87 Difference]: Start difference. First operand 39328 states and 100097 transitions. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:25,294 INFO L93 Difference]: Finished difference Result 48125 states and 120980 transitions. [2022-01-18 14:22:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:22:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:25,371 INFO L225 Difference]: With dead ends: 48125 [2022-01-18 14:22:25,371 INFO L226 Difference]: Without dead ends: 48125 [2022-01-18 14:22:25,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:22:25,371 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 323 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:25,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 157 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:22:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48125 states. [2022-01-18 14:22:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48125 to 42059. [2022-01-18 14:22:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42059 states, 42058 states have (on average 2.5625564696371677) internal successors, (107776), 42058 states have internal predecessors, (107776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42059 states to 42059 states and 107776 transitions. [2022-01-18 14:22:26,347 INFO L78 Accepts]: Start accepts. Automaton has 42059 states and 107776 transitions. Word has length 53 [2022-01-18 14:22:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 42059 states and 107776 transitions. [2022-01-18 14:22:26,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42059 states and 107776 transitions. [2022-01-18 14:22:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:26,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:26,382 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:26,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 14:22:26,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:26,582 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash -31765044, now seen corresponding path program 61 times [2022-01-18 14:22:26,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:26,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49931990] [2022-01-18 14:22:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:26,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:26,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49931990] [2022-01-18 14:22:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49931990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135060121] [2022-01-18 14:22:26,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:22:26,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:26,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:26,682 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:26,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 14:22:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:26,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:26,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:26,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:26,863 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:22:26,863 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 15 [2022-01-18 14:22:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:26,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135060121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:26,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:26,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:22:26,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874923133] [2022-01-18 14:22:26,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:26,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:22:26,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:22:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:22:26,975 INFO L87 Difference]: Start difference. First operand 42059 states and 107776 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:27,541 INFO L93 Difference]: Finished difference Result 44173 states and 112253 transitions. [2022-01-18 14:22:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:22:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:27,613 INFO L225 Difference]: With dead ends: 44173 [2022-01-18 14:22:27,613 INFO L226 Difference]: Without dead ends: 44155 [2022-01-18 14:22:27,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:22:27,613 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 143 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:27,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 460 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:22:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44155 states. [2022-01-18 14:22:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44155 to 41812. [2022-01-18 14:22:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41812 states, 41811 states have (on average 2.5626031427136398) internal successors, (107145), 41811 states have internal predecessors, (107145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41812 states to 41812 states and 107145 transitions. [2022-01-18 14:22:28,549 INFO L78 Accepts]: Start accepts. Automaton has 41812 states and 107145 transitions. Word has length 53 [2022-01-18 14:22:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:28,550 INFO L470 AbstractCegarLoop]: Abstraction has 41812 states and 107145 transitions. [2022-01-18 14:22:28,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 41812 states and 107145 transitions. [2022-01-18 14:22:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:28,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:28,584 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:28,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-18 14:22:28,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-01-18 14:22:28,785 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2090448358, now seen corresponding path program 132 times [2022-01-18 14:22:28,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373578971] [2022-01-18 14:22:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:28,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:28,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:28,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373578971] [2022-01-18 14:22:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373578971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:28,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412527427] [2022-01-18 14:22:28,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:22:28,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:28,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:28,883 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:28,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 14:22:28,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 14:22:28,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:22:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:29,181 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:22:29,181 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 16 [2022-01-18 14:22:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:29,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:29,302 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:22:29,302 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 15 [2022-01-18 14:22:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 24 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:29,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412527427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:29,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:29,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 23 [2022-01-18 14:22:29,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369893810] [2022-01-18 14:22:29,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:29,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:22:29,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:22:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:22:29,524 INFO L87 Difference]: Start difference. First operand 41812 states and 107145 transitions. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:31,402 INFO L93 Difference]: Finished difference Result 48369 states and 122444 transitions. [2022-01-18 14:22:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 14:22:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:31,483 INFO L225 Difference]: With dead ends: 48369 [2022-01-18 14:22:31,483 INFO L226 Difference]: Without dead ends: 48339 [2022-01-18 14:22:31,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=874, Invalid=3682, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 14:22:31,484 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 422 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:31,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 572 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1925 Invalid, 0 Unknown, 243 Unchecked, 0.7s Time] [2022-01-18 14:22:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48339 states. [2022-01-18 14:22:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48339 to 42525. [2022-01-18 14:22:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42525 states, 42524 states have (on average 2.565751105258207) internal successors, (109106), 42524 states have internal predecessors, (109106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42525 states to 42525 states and 109106 transitions. [2022-01-18 14:22:32,459 INFO L78 Accepts]: Start accepts. Automaton has 42525 states and 109106 transitions. Word has length 53 [2022-01-18 14:22:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:32,459 INFO L470 AbstractCegarLoop]: Abstraction has 42525 states and 109106 transitions. [2022-01-18 14:22:32,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 42525 states and 109106 transitions. [2022-01-18 14:22:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:32,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:32,492 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:32,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:32,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-01-18 14:22:32,693 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:32,694 INFO L85 PathProgramCache]: Analyzing trace with hash 528868552, now seen corresponding path program 62 times [2022-01-18 14:22:32,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:32,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748903999] [2022-01-18 14:22:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:32,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:32,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:32,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748903999] [2022-01-18 14:22:32,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748903999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:32,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826748327] [2022-01-18 14:22:32,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:32,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:32,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:32,813 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:32,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 14:22:32,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:32,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:33,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:33,038 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:33,038 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 20 treesize of output 19 [2022-01-18 14:22:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:33,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826748327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:33,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:33,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:22:33,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121923964] [2022-01-18 14:22:33,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:33,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:22:33,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:22:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:22:33,152 INFO L87 Difference]: Start difference. First operand 42525 states and 109106 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:34,084 INFO L93 Difference]: Finished difference Result 43599 states and 111104 transitions. [2022-01-18 14:22:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:22:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:34,163 INFO L225 Difference]: With dead ends: 43599 [2022-01-18 14:22:34,163 INFO L226 Difference]: Without dead ends: 43543 [2022-01-18 14:22:34,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:22:34,164 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 162 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:34,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 553 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:22:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43543 states. [2022-01-18 14:22:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43543 to 42505. [2022-01-18 14:22:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42505 states, 42504 states have (on average 2.5641821946169774) internal successors, (108988), 42504 states have internal predecessors, (108988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42505 states to 42505 states and 108988 transitions. [2022-01-18 14:22:35,163 INFO L78 Accepts]: Start accepts. Automaton has 42505 states and 108988 transitions. Word has length 53 [2022-01-18 14:22:35,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:35,163 INFO L470 AbstractCegarLoop]: Abstraction has 42505 states and 108988 transitions. [2022-01-18 14:22:35,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42505 states and 108988 transitions. [2022-01-18 14:22:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:35,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:35,196 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:35,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-18 14:22:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:35,397 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1969525058, now seen corresponding path program 63 times [2022-01-18 14:22:35,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:35,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446196763] [2022-01-18 14:22:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:35,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:35,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446196763] [2022-01-18 14:22:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446196763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96437639] [2022-01-18 14:22:35,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:22:35,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:35,508 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:35,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 14:22:35,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-18 14:22:35,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:35,778 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:35,778 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 20 treesize of output 19 [2022-01-18 14:22:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:35,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96437639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:35,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:35,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:22:35,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885454583] [2022-01-18 14:22:35,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:35,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:22:35,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:35,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:22:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:22:35,883 INFO L87 Difference]: Start difference. First operand 42505 states and 108988 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:36,258 INFO L93 Difference]: Finished difference Result 45242 states and 114967 transitions. [2022-01-18 14:22:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:22:36,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:36,337 INFO L225 Difference]: With dead ends: 45242 [2022-01-18 14:22:36,337 INFO L226 Difference]: Without dead ends: 45234 [2022-01-18 14:22:36,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:22:36,337 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:36,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 351 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 686 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2022-01-18 14:22:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45234 states. [2022-01-18 14:22:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45234 to 44151. [2022-01-18 14:22:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44151 states, 44150 states have (on average 2.55599093997735) internal successors, (112847), 44150 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44151 states to 44151 states and 112847 transitions. [2022-01-18 14:22:37,220 INFO L78 Accepts]: Start accepts. Automaton has 44151 states and 112847 transitions. Word has length 53 [2022-01-18 14:22:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:37,220 INFO L470 AbstractCegarLoop]: Abstraction has 44151 states and 112847 transitions. [2022-01-18 14:22:37,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 44151 states and 112847 transitions. [2022-01-18 14:22:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:37,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:37,255 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:37,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 14:22:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 14:22:37,455 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -31050190, now seen corresponding path program 64 times [2022-01-18 14:22:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752424643] [2022-01-18 14:22:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:37,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 114 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:37,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752424643] [2022-01-18 14:22:37,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752424643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:37,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162163609] [2022-01-18 14:22:37,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:22:37,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:37,595 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:37,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 14:22:37,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:22:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:37,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:37,922 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:37,923 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 20 treesize of output 19 [2022-01-18 14:22:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:38,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162163609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:38,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:38,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:22:38,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909193941] [2022-01-18 14:22:38,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:38,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:22:38,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:22:38,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:22:38,031 INFO L87 Difference]: Start difference. First operand 44151 states and 112847 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:38,492 INFO L93 Difference]: Finished difference Result 45152 states and 114793 transitions. [2022-01-18 14:22:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:22:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:38,572 INFO L225 Difference]: With dead ends: 45152 [2022-01-18 14:22:38,572 INFO L226 Difference]: Without dead ends: 45068 [2022-01-18 14:22:38,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:22:38,572 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 147 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:38,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 437 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 963 Invalid, 0 Unknown, 230 Unchecked, 0.3s Time] [2022-01-18 14:22:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45068 states. [2022-01-18 14:22:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45068 to 42510. [2022-01-18 14:22:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42510 states, 42509 states have (on average 2.5631983815192076) internal successors, (108959), 42509 states have internal predecessors, (108959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42510 states to 42510 states and 108959 transitions. [2022-01-18 14:22:39,748 INFO L78 Accepts]: Start accepts. Automaton has 42510 states and 108959 transitions. Word has length 53 [2022-01-18 14:22:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 42510 states and 108959 transitions. [2022-01-18 14:22:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42510 states and 108959 transitions. [2022-01-18 14:22:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:39,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:39,779 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:39,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 14:22:39,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-01-18 14:22:39,980 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 169679112, now seen corresponding path program 65 times [2022-01-18 14:22:39,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296879162] [2022-01-18 14:22:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:39,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:40,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296879162] [2022-01-18 14:22:40,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296879162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743588360] [2022-01-18 14:22:40,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:22:40,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:40,110 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:40,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 14:22:40,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 14:22:40,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:40,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:40,439 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:40,440 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 20 treesize of output 19 [2022-01-18 14:22:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:40,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743588360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:40,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:40,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 14:22:40,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743162214] [2022-01-18 14:22:40,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:40,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:22:40,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:22:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:22:40,542 INFO L87 Difference]: Start difference. First operand 42510 states and 108959 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:41,161 INFO L93 Difference]: Finished difference Result 43647 states and 111189 transitions. [2022-01-18 14:22:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:22:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:41,235 INFO L225 Difference]: With dead ends: 43647 [2022-01-18 14:22:41,235 INFO L226 Difference]: Without dead ends: 43586 [2022-01-18 14:22:41,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:22:41,235 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 179 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:41,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 557 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1408 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-01-18 14:22:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43586 states. [2022-01-18 14:22:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43586 to 42512. [2022-01-18 14:22:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42512 states, 42511 states have (on average 2.562419138575898) internal successors, (108931), 42511 states have internal predecessors, (108931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42512 states to 42512 states and 108931 transitions. [2022-01-18 14:22:42,102 INFO L78 Accepts]: Start accepts. Automaton has 42512 states and 108931 transitions. Word has length 53 [2022-01-18 14:22:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:42,102 INFO L470 AbstractCegarLoop]: Abstraction has 42512 states and 108931 transitions. [2022-01-18 14:22:42,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42512 states and 108931 transitions. [2022-01-18 14:22:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:42,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:42,136 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:42,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 14:22:42,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:42,343 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 476369534, now seen corresponding path program 66 times [2022-01-18 14:22:42,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:42,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781487858] [2022-01-18 14:22:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:42,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:42,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781487858] [2022-01-18 14:22:42,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781487858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299116540] [2022-01-18 14:22:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:22:42,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:42,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:42,478 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:42,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 14:22:42,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 14:22:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:22:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:42,906 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:22:42,906 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 16 [2022-01-18 14:22:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:42,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:43,807 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:22:43,807 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 15 [2022-01-18 14:22:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:44,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299116540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:44,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:44,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 37 [2022-01-18 14:22:44,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092118697] [2022-01-18 14:22:44,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:44,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 14:22:44,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 14:22:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 14:22:44,008 INFO L87 Difference]: Start difference. First operand 42512 states and 108931 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:47,349 INFO L93 Difference]: Finished difference Result 52518 states and 132174 transitions. [2022-01-18 14:22:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 14:22:47,350 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:47,446 INFO L225 Difference]: With dead ends: 52518 [2022-01-18 14:22:47,446 INFO L226 Difference]: Without dead ends: 52427 [2022-01-18 14:22:47,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1546, Invalid=7574, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 14:22:47,447 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 805 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:47,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 1315 Invalid, 4014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3443 Invalid, 0 Unknown, 423 Unchecked, 1.2s Time] [2022-01-18 14:22:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52427 states. [2022-01-18 14:22:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52427 to 41614. [2022-01-18 14:22:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41614 states, 41613 states have (on average 2.572465335351933) internal successors, (107048), 41613 states have internal predecessors, (107048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41614 states to 41614 states and 107048 transitions. [2022-01-18 14:22:48,407 INFO L78 Accepts]: Start accepts. Automaton has 41614 states and 107048 transitions. Word has length 53 [2022-01-18 14:22:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:48,407 INFO L470 AbstractCegarLoop]: Abstraction has 41614 states and 107048 transitions. [2022-01-18 14:22:48,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41614 states and 107048 transitions. [2022-01-18 14:22:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:48,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:48,440 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:48,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 14:22:48,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:48,640 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1686326946, now seen corresponding path program 67 times [2022-01-18 14:22:48,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:48,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511312464] [2022-01-18 14:22:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:48,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:48,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511312464] [2022-01-18 14:22:48,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511312464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233052720] [2022-01-18 14:22:48,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:22:48,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:48,766 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:48,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 14:22:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:48,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:48,953 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:48,953 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 20 treesize of output 19 [2022-01-18 14:22:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:49,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233052720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:49,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:49,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-01-18 14:22:49,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221388637] [2022-01-18 14:22:49,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:49,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:22:49,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:22:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:22:49,025 INFO L87 Difference]: Start difference. First operand 41614 states and 107048 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:49,859 INFO L93 Difference]: Finished difference Result 52908 states and 133576 transitions. [2022-01-18 14:22:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:22:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:49,951 INFO L225 Difference]: With dead ends: 52908 [2022-01-18 14:22:49,951 INFO L226 Difference]: Without dead ends: 52828 [2022-01-18 14:22:49,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:22:49,952 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 203 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:49,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 328 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:22:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52828 states. [2022-01-18 14:22:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52828 to 41312. [2022-01-18 14:22:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41312 states, 41311 states have (on average 2.5717847546658277) internal successors, (106243), 41311 states have internal predecessors, (106243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41312 states to 41312 states and 106243 transitions. [2022-01-18 14:22:50,938 INFO L78 Accepts]: Start accepts. Automaton has 41312 states and 106243 transitions. Word has length 53 [2022-01-18 14:22:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:50,938 INFO L470 AbstractCegarLoop]: Abstraction has 41312 states and 106243 transitions. [2022-01-18 14:22:50,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 41312 states and 106243 transitions. [2022-01-18 14:22:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:50,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:50,972 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:50,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 14:22:51,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:51,172 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1168438494, now seen corresponding path program 133 times [2022-01-18 14:22:51,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360576161] [2022-01-18 14:22:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:51,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:51,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360576161] [2022-01-18 14:22:51,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360576161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588269061] [2022-01-18 14:22:51,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:22:51,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:51,294 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:51,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 14:22:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:51,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:51,617 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:51,617 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 20 treesize of output 19 [2022-01-18 14:22:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588269061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:51,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:51,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 14:22:51,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633943856] [2022-01-18 14:22:51,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:51,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:22:51,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:22:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:22:51,705 INFO L87 Difference]: Start difference. First operand 41312 states and 106243 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:52,166 INFO L93 Difference]: Finished difference Result 41625 states and 106838 transitions. [2022-01-18 14:22:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:22:52,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:52,243 INFO L225 Difference]: With dead ends: 41625 [2022-01-18 14:22:52,243 INFO L226 Difference]: Without dead ends: 41501 [2022-01-18 14:22:52,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:22:52,244 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 62 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:52,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 379 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1027 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-01-18 14:22:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41501 states. [2022-01-18 14:22:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41501 to 41342. [2022-01-18 14:22:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41342 states, 41341 states have (on average 2.570668343774945) internal successors, (106274), 41341 states have internal predecessors, (106274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41342 states to 41342 states and 106274 transitions. [2022-01-18 14:22:53,122 INFO L78 Accepts]: Start accepts. Automaton has 41342 states and 106274 transitions. Word has length 53 [2022-01-18 14:22:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:53,123 INFO L470 AbstractCegarLoop]: Abstraction has 41342 states and 106274 transitions. [2022-01-18 14:22:53,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 41342 states and 106274 transitions. [2022-01-18 14:22:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:53,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:53,155 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:53,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:53,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:53,355 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1934203828, now seen corresponding path program 134 times [2022-01-18 14:22:53,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:53,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264081605] [2022-01-18 14:22:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:53,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:53,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:53,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264081605] [2022-01-18 14:22:53,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264081605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:53,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338893230] [2022-01-18 14:22:53,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:53,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:53,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:53,504 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:53,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 14:22:53,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:53,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:22:53,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:53,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:53,870 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:22:53,870 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 20 treesize of output 19 [2022-01-18 14:22:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:22:53,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338893230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:53,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:53,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-01-18 14:22:53,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880303381] [2022-01-18 14:22:53,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:53,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:22:53,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:22:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:22:53,958 INFO L87 Difference]: Start difference. First operand 41342 states and 106274 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:22:54,402 INFO L93 Difference]: Finished difference Result 41619 states and 106757 transitions. [2022-01-18 14:22:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:22:54,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:22:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:22:54,469 INFO L225 Difference]: With dead ends: 41619 [2022-01-18 14:22:54,469 INFO L226 Difference]: Without dead ends: 41495 [2022-01-18 14:22:54,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:22:54,470 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:22:54,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 452 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1030 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-01-18 14:22:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41495 states. [2022-01-18 14:22:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41495 to 41336. [2022-01-18 14:22:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41336 states, 41335 states have (on average 2.5703157130760856) internal successors, (106244), 41335 states have internal predecessors, (106244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41336 states to 41336 states and 106244 transitions. [2022-01-18 14:22:55,311 INFO L78 Accepts]: Start accepts. Automaton has 41336 states and 106244 transitions. Word has length 53 [2022-01-18 14:22:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:22:55,311 INFO L470 AbstractCegarLoop]: Abstraction has 41336 states and 106244 transitions. [2022-01-18 14:22:55,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:22:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 41336 states and 106244 transitions. [2022-01-18 14:22:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:22:55,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:22:55,344 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:22:55,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-01-18 14:22:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:55,544 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:22:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:22:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1803232074, now seen corresponding path program 68 times [2022-01-18 14:22:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:22:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713655029] [2022-01-18 14:22:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:22:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:22:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:22:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:22:55,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:22:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713655029] [2022-01-18 14:22:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713655029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:22:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917436023] [2022-01-18 14:22:55,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:22:55,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:22:55,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:22:55,683 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:22:55,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 14:22:55,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:22:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:22:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 14:22:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:22:56,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:22:56,370 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 16 treesize of output 12 [2022-01-18 14:22:56,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:22:56,373 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 8 treesize of output 1 [2022-01-18 14:22:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 35 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:56,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:22:56,807 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:22:56,807 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 15 [2022-01-18 14:22:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 26 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:22:56,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917436023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:22:56,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:22:56,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 18] total 38 [2022-01-18 14:22:56,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640461643] [2022-01-18 14:22:56,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:22:56,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 14:22:56,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:22:56,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 14:22:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:22:56,923 INFO L87 Difference]: Start difference. First operand 41336 states and 106244 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:01,693 INFO L93 Difference]: Finished difference Result 73813 states and 184916 transitions. [2022-01-18 14:23:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-18 14:23:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:01,830 INFO L225 Difference]: With dead ends: 73813 [2022-01-18 14:23:01,830 INFO L226 Difference]: Without dead ends: 73481 [2022-01-18 14:23:01,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 135 SyntacticMatches, 23 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 12192 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3118, Invalid=27332, Unknown=0, NotChecked=0, Total=30450 [2022-01-18 14:23:01,832 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 884 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2478 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:01,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1033 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1981 Invalid, 0 Unknown, 2478 Unchecked, 0.7s Time] [2022-01-18 14:23:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73481 states. [2022-01-18 14:23:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73481 to 48966. [2022-01-18 14:23:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48966 states, 48965 states have (on average 2.584682936791586) internal successors, (126559), 48965 states have internal predecessors, (126559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48966 states to 48966 states and 126559 transitions. [2022-01-18 14:23:03,059 INFO L78 Accepts]: Start accepts. Automaton has 48966 states and 126559 transitions. Word has length 53 [2022-01-18 14:23:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:03,059 INFO L470 AbstractCegarLoop]: Abstraction has 48966 states and 126559 transitions. [2022-01-18 14:23:03,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 48966 states and 126559 transitions. [2022-01-18 14:23:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:03,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:03,094 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:03,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 14:23:03,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:03,294 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash -653431978, now seen corresponding path program 69 times [2022-01-18 14:23:03,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:03,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406859265] [2022-01-18 14:23:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:03,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:03,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:03,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406859265] [2022-01-18 14:23:03,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406859265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:03,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243392154] [2022-01-18 14:23:03,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:23:03,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:03,402 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:03,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 14:23:03,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:23:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:03,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:03,595 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:03,595 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 20 treesize of output 19 [2022-01-18 14:23:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243392154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:03,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:03,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:23:03,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796026710] [2022-01-18 14:23:03,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:23:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:23:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:23:03,685 INFO L87 Difference]: Start difference. First operand 48966 states and 126559 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:05,312 INFO L93 Difference]: Finished difference Result 80122 states and 200803 transitions. [2022-01-18 14:23:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 14:23:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:05,464 INFO L225 Difference]: With dead ends: 80122 [2022-01-18 14:23:05,465 INFO L226 Difference]: Without dead ends: 79934 [2022-01-18 14:23:05,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 14:23:05,465 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 359 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:05,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 978 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:23:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79934 states. [2022-01-18 14:23:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79934 to 53579. [2022-01-18 14:23:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53579 states, 53578 states have (on average 2.5988278771137407) internal successors, (139240), 53578 states have internal predecessors, (139240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53579 states to 53579 states and 139240 transitions. [2022-01-18 14:23:06,994 INFO L78 Accepts]: Start accepts. Automaton has 53579 states and 139240 transitions. Word has length 53 [2022-01-18 14:23:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:06,994 INFO L470 AbstractCegarLoop]: Abstraction has 53579 states and 139240 transitions. [2022-01-18 14:23:06,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 53579 states and 139240 transitions. [2022-01-18 14:23:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:07,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:07,262 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:07,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:07,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:07,471 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1479026038, now seen corresponding path program 135 times [2022-01-18 14:23:07,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975197114] [2022-01-18 14:23:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:07,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:07,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975197114] [2022-01-18 14:23:07,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975197114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940983413] [2022-01-18 14:23:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:23:07,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:07,601 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:07,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 14:23:07,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-18 14:23:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:07,906 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:07,906 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 20 treesize of output 19 [2022-01-18 14:23:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:08,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940983413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:08,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:08,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:23:08,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986168671] [2022-01-18 14:23:08,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:08,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:23:08,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:08,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:23:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:08,011 INFO L87 Difference]: Start difference. First operand 53579 states and 139240 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:08,498 INFO L93 Difference]: Finished difference Result 57988 states and 149328 transitions. [2022-01-18 14:23:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:23:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:08,613 INFO L225 Difference]: With dead ends: 57988 [2022-01-18 14:23:08,614 INFO L226 Difference]: Without dead ends: 57906 [2022-01-18 14:23:08,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:08,614 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 80 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:08,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 394 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 823 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-01-18 14:23:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57906 states. [2022-01-18 14:23:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57906 to 56239. [2022-01-18 14:23:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56239 states, 56238 states have (on average 2.593815569543725) internal successors, (145871), 56238 states have internal predecessors, (145871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56239 states to 56239 states and 145871 transitions. [2022-01-18 14:23:09,853 INFO L78 Accepts]: Start accepts. Automaton has 56239 states and 145871 transitions. Word has length 53 [2022-01-18 14:23:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:09,853 INFO L470 AbstractCegarLoop]: Abstraction has 56239 states and 145871 transitions. [2022-01-18 14:23:09,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 56239 states and 145871 transitions. [2022-01-18 14:23:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:09,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:09,889 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:09,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-18 14:23:10,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-18 14:23:10,095 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash 699212192, now seen corresponding path program 136 times [2022-01-18 14:23:10,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:10,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856664117] [2022-01-18 14:23:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:10,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:10,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856664117] [2022-01-18 14:23:10,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856664117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:10,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088235412] [2022-01-18 14:23:10,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:10,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:10,220 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:10,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 14:23:10,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:10,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:10,542 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:10,542 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 20 treesize of output 19 [2022-01-18 14:23:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:10,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088235412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:10,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:10,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 14:23:10,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132675449] [2022-01-18 14:23:10,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:10,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:23:10,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:23:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:23:10,639 INFO L87 Difference]: Start difference. First operand 56239 states and 145871 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:11,641 INFO L93 Difference]: Finished difference Result 58369 states and 150079 transitions. [2022-01-18 14:23:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:23:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:11,749 INFO L225 Difference]: With dead ends: 58369 [2022-01-18 14:23:11,749 INFO L226 Difference]: Without dead ends: 58278 [2022-01-18 14:23:11,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:23:11,749 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 165 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:11,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 807 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1584 Invalid, 0 Unknown, 412 Unchecked, 0.5s Time] [2022-01-18 14:23:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58278 states. [2022-01-18 14:23:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58278 to 56494. [2022-01-18 14:23:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56494 states, 56493 states have (on average 2.5927460039296903) internal successors, (146472), 56493 states have internal predecessors, (146472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56494 states to 56494 states and 146472 transitions. [2022-01-18 14:23:13,032 INFO L78 Accepts]: Start accepts. Automaton has 56494 states and 146472 transitions. Word has length 53 [2022-01-18 14:23:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:13,032 INFO L470 AbstractCegarLoop]: Abstraction has 56494 states and 146472 transitions. [2022-01-18 14:23:13,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 56494 states and 146472 transitions. [2022-01-18 14:23:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:13,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:13,068 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:13,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:13,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 14:23:13,269 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash -407050786, now seen corresponding path program 70 times [2022-01-18 14:23:13,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:13,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544908315] [2022-01-18 14:23:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:13,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:13,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544908315] [2022-01-18 14:23:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544908315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064266724] [2022-01-18 14:23:13,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:13,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:13,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:13,387 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:13,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 14:23:13,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:13,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:13,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:13,600 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:13,600 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 20 treesize of output 19 [2022-01-18 14:23:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:13,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064266724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:13,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:13,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-01-18 14:23:13,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026093429] [2022-01-18 14:23:13,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:13,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:23:13,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:23:13,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:23:13,687 INFO L87 Difference]: Start difference. First operand 56494 states and 146472 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:14,770 INFO L93 Difference]: Finished difference Result 64184 states and 163109 transitions. [2022-01-18 14:23:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:23:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:14,897 INFO L225 Difference]: With dead ends: 64184 [2022-01-18 14:23:14,898 INFO L226 Difference]: Without dead ends: 63854 [2022-01-18 14:23:14,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:23:14,898 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:14,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 446 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1250 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-01-18 14:23:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63854 states. [2022-01-18 14:23:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63854 to 54612. [2022-01-18 14:23:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54612 states, 54611 states have (on average 2.5695922066982844) internal successors, (140328), 54611 states have internal predecessors, (140328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54612 states to 54612 states and 140328 transitions. [2022-01-18 14:23:16,107 INFO L78 Accepts]: Start accepts. Automaton has 54612 states and 140328 transitions. Word has length 53 [2022-01-18 14:23:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 54612 states and 140328 transitions. [2022-01-18 14:23:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 54612 states and 140328 transitions. [2022-01-18 14:23:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:16,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:16,143 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:16,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 14:23:16,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 14:23:16,344 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -224609493, now seen corresponding path program 71 times [2022-01-18 14:23:16,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772800342] [2022-01-18 14:23:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:16,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:16,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:16,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772800342] [2022-01-18 14:23:16,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772800342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:16,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622439412] [2022-01-18 14:23:16,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:23:16,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:16,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:16,467 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:16,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 14:23:16,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 14:23:16,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:16,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:16,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:16,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622439412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:16,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:16,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-01-18 14:23:16,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696108182] [2022-01-18 14:23:16,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:16,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:23:16,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:23:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:23:16,847 INFO L87 Difference]: Start difference. First operand 54612 states and 140328 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:17,432 INFO L93 Difference]: Finished difference Result 58245 states and 148141 transitions. [2022-01-18 14:23:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:23:17,432 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:17,542 INFO L225 Difference]: With dead ends: 58245 [2022-01-18 14:23:17,542 INFO L226 Difference]: Without dead ends: 58183 [2022-01-18 14:23:17,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:23:17,543 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 258 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:17,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 321 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:23:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58183 states. [2022-01-18 14:23:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58183 to 52700. [2022-01-18 14:23:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52700 states, 52699 states have (on average 2.5625343934420006) internal successors, (135043), 52699 states have internal predecessors, (135043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52700 states to 52700 states and 135043 transitions. [2022-01-18 14:23:19,030 INFO L78 Accepts]: Start accepts. Automaton has 52700 states and 135043 transitions. Word has length 53 [2022-01-18 14:23:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:19,030 INFO L470 AbstractCegarLoop]: Abstraction has 52700 states and 135043 transitions. [2022-01-18 14:23:19,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 52700 states and 135043 transitions. [2022-01-18 14:23:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:19,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:19,065 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:19,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-01-18 14:23:19,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:19,266 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1994117026, now seen corresponding path program 72 times [2022-01-18 14:23:19,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301273008] [2022-01-18 14:23:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:19,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:19,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301273008] [2022-01-18 14:23:19,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301273008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820726001] [2022-01-18 14:23:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:23:19,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:19,391 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:19,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 14:23:19,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:23:19,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:19,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:19,582 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:19,582 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 20 treesize of output 19 [2022-01-18 14:23:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820726001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:19,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:19,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:23:19,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630903581] [2022-01-18 14:23:19,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:19,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:23:19,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:19,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:23:19,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:23:19,674 INFO L87 Difference]: Start difference. First operand 52700 states and 135043 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:20,347 INFO L93 Difference]: Finished difference Result 65449 states and 165027 transitions. [2022-01-18 14:23:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:23:20,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:20,466 INFO L225 Difference]: With dead ends: 65449 [2022-01-18 14:23:20,466 INFO L226 Difference]: Without dead ends: 65367 [2022-01-18 14:23:20,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:23:20,466 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:20,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 379 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:23:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65367 states. [2022-01-18 14:23:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65367 to 52551. [2022-01-18 14:23:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52551 states, 52550 states have (on average 2.5602283539486206) internal successors, (134540), 52550 states have internal predecessors, (134540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52551 states to 52551 states and 134540 transitions. [2022-01-18 14:23:21,765 INFO L78 Accepts]: Start accepts. Automaton has 52551 states and 134540 transitions. Word has length 53 [2022-01-18 14:23:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:21,766 INFO L470 AbstractCegarLoop]: Abstraction has 52551 states and 134540 transitions. [2022-01-18 14:23:21,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52551 states and 134540 transitions. [2022-01-18 14:23:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:21,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:21,801 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:21,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-01-18 14:23:22,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:22,001 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1771275298, now seen corresponding path program 137 times [2022-01-18 14:23:22,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:22,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426151795] [2022-01-18 14:23:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:22,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:22,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426151795] [2022-01-18 14:23:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426151795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753335362] [2022-01-18 14:23:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:23:22,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:22,107 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:22,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 14:23:22,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 14:23:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:22,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:22,358 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:22,358 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 20 treesize of output 19 [2022-01-18 14:23:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:22,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753335362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:22,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:22,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:23:22,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452155358] [2022-01-18 14:23:22,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:22,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:23:22,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:23:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:23:22,658 INFO L87 Difference]: Start difference. First operand 52551 states and 134540 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:23,269 INFO L93 Difference]: Finished difference Result 53580 states and 136408 transitions. [2022-01-18 14:23:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:23:23,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:23,366 INFO L225 Difference]: With dead ends: 53580 [2022-01-18 14:23:23,366 INFO L226 Difference]: Without dead ends: 53528 [2022-01-18 14:23:23,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 98 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:23,367 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 77 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:23,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 490 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:23:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53528 states. [2022-01-18 14:23:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53528 to 52560. [2022-01-18 14:23:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52560 states, 52559 states have (on average 2.5596948191556157) internal successors, (134535), 52559 states have internal predecessors, (134535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52560 states to 52560 states and 134535 transitions. [2022-01-18 14:23:24,445 INFO L78 Accepts]: Start accepts. Automaton has 52560 states and 134535 transitions. Word has length 53 [2022-01-18 14:23:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:24,446 INFO L470 AbstractCegarLoop]: Abstraction has 52560 states and 134535 transitions. [2022-01-18 14:23:24,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 52560 states and 134535 transitions. [2022-01-18 14:23:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:24,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:24,479 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:24,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-18 14:23:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-01-18 14:23:24,680 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1794407220, now seen corresponding path program 138 times [2022-01-18 14:23:24,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:24,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434497320] [2022-01-18 14:23:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:24,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:24,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434497320] [2022-01-18 14:23:24,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434497320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613616870] [2022-01-18 14:23:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:23:24,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:24,793 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:24,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 14:23:24,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 14:23:24,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:25,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:25,074 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:25,074 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 20 treesize of output 19 [2022-01-18 14:23:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:25,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613616870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:25,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:25,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:23:25,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638970484] [2022-01-18 14:23:25,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:25,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:23:25,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:23:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:25,180 INFO L87 Difference]: Start difference. First operand 52560 states and 134535 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:25,588 INFO L93 Difference]: Finished difference Result 52849 states and 135062 transitions. [2022-01-18 14:23:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:23:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:25,689 INFO L225 Difference]: With dead ends: 52849 [2022-01-18 14:23:25,689 INFO L226 Difference]: Without dead ends: 52799 [2022-01-18 14:23:25,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:25,689 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:25,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 348 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 719 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-01-18 14:23:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52799 states. [2022-01-18 14:23:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52799 to 52554. [2022-01-18 14:23:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52554 states, 52553 states have (on average 2.559568435674462) internal successors, (134513), 52553 states have internal predecessors, (134513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52554 states to 52554 states and 134513 transitions. [2022-01-18 14:23:26,775 INFO L78 Accepts]: Start accepts. Automaton has 52554 states and 134513 transitions. Word has length 53 [2022-01-18 14:23:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:26,775 INFO L470 AbstractCegarLoop]: Abstraction has 52554 states and 134513 transitions. [2022-01-18 14:23:26,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 52554 states and 134513 transitions. [2022-01-18 14:23:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:26,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:26,808 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:26,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:27,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:27,009 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:27,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1227210166, now seen corresponding path program 73 times [2022-01-18 14:23:27,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:27,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487448078] [2022-01-18 14:23:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:27,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487448078] [2022-01-18 14:23:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487448078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206938230] [2022-01-18 14:23:27,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:23:27,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:27,113 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:27,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 14:23:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:27,529 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:27,529 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 20 treesize of output 19 [2022-01-18 14:23:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:27,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206938230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:27,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:27,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:23:27,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563845304] [2022-01-18 14:23:27,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:27,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:23:27,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:23:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:23:27,634 INFO L87 Difference]: Start difference. First operand 52554 states and 134513 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:28,299 INFO L93 Difference]: Finished difference Result 58314 states and 147608 transitions. [2022-01-18 14:23:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:23:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:28,406 INFO L225 Difference]: With dead ends: 58314 [2022-01-18 14:23:28,406 INFO L226 Difference]: Without dead ends: 58310 [2022-01-18 14:23:28,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:23:28,406 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 134 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:28,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 397 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:23:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58310 states. [2022-01-18 14:23:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58310 to 52280. [2022-01-18 14:23:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52280 states, 52279 states have (on average 2.5601484343617895) internal successors, (133842), 52279 states have internal predecessors, (133842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52280 states to 52280 states and 133842 transitions. [2022-01-18 14:23:29,517 INFO L78 Accepts]: Start accepts. Automaton has 52280 states and 133842 transitions. Word has length 53 [2022-01-18 14:23:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:29,517 INFO L470 AbstractCegarLoop]: Abstraction has 52280 states and 133842 transitions. [2022-01-18 14:23:29,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 52280 states and 133842 transitions. [2022-01-18 14:23:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:29,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:29,553 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:29,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 14:23:29,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:29,753 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1404101110, now seen corresponding path program 139 times [2022-01-18 14:23:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760135771] [2022-01-18 14:23:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:29,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:29,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:29,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760135771] [2022-01-18 14:23:29,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760135771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:29,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338430315] [2022-01-18 14:23:29,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:23:29,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:29,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:29,888 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:29,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 14:23:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:29,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:29,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:30,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:30,175 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:30,175 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 20 treesize of output 19 [2022-01-18 14:23:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338430315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:30,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:30,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:23:30,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558651882] [2022-01-18 14:23:30,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:30,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:23:30,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:23:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:30,275 INFO L87 Difference]: Start difference. First operand 52280 states and 133842 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:30,670 INFO L93 Difference]: Finished difference Result 54178 states and 137525 transitions. [2022-01-18 14:23:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:23:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:30,766 INFO L225 Difference]: With dead ends: 54178 [2022-01-18 14:23:30,766 INFO L226 Difference]: Without dead ends: 54158 [2022-01-18 14:23:30,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:30,766 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:30,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 155 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 667 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-18 14:23:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54158 states. [2022-01-18 14:23:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54158 to 53049. [2022-01-18 14:23:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53049 states, 53048 states have (on average 2.5523488161664907) internal successors, (135397), 53048 states have internal predecessors, (135397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53049 states to 53049 states and 135397 transitions. [2022-01-18 14:23:31,871 INFO L78 Accepts]: Start accepts. Automaton has 53049 states and 135397 transitions. Word has length 53 [2022-01-18 14:23:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:31,871 INFO L470 AbstractCegarLoop]: Abstraction has 53049 states and 135397 transitions. [2022-01-18 14:23:31,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 53049 states and 135397 transitions. [2022-01-18 14:23:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:32,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:32,129 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:32,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-18 14:23:32,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:32,331 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash -801348778, now seen corresponding path program 140 times [2022-01-18 14:23:32,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765502439] [2022-01-18 14:23:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:32,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:32,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765502439] [2022-01-18 14:23:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765502439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552510182] [2022-01-18 14:23:32,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:23:32,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:32,431 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 14:23:32,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:23:32,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:32,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:32,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:32,680 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:32,680 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 20 treesize of output 19 [2022-01-18 14:23:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:23:32,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552510182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:32,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:32,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:23:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074480181] [2022-01-18 14:23:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:23:32,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:23:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:23:32,788 INFO L87 Difference]: Start difference. First operand 53049 states and 135397 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:33,190 INFO L93 Difference]: Finished difference Result 53293 states and 135841 transitions. [2022-01-18 14:23:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:23:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:33,286 INFO L225 Difference]: With dead ends: 53293 [2022-01-18 14:23:33,287 INFO L226 Difference]: Without dead ends: 53243 [2022-01-18 14:23:33,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:23:33,287 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:33,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 306 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 727 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-01-18 14:23:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53243 states. [2022-01-18 14:23:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53243 to 53037. [2022-01-18 14:23:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53037 states, 53036 states have (on average 2.551399049702089) internal successors, (135316), 53036 states have internal predecessors, (135316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53037 states to 53037 states and 135316 transitions. [2022-01-18 14:23:34,394 INFO L78 Accepts]: Start accepts. Automaton has 53037 states and 135316 transitions. Word has length 53 [2022-01-18 14:23:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:34,394 INFO L470 AbstractCegarLoop]: Abstraction has 53037 states and 135316 transitions. [2022-01-18 14:23:34,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 53037 states and 135316 transitions. [2022-01-18 14:23:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:34,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:34,429 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:34,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:34,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:34,629 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash -711730313, now seen corresponding path program 74 times [2022-01-18 14:23:34,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:34,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747187044] [2022-01-18 14:23:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:34,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:34,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747187044] [2022-01-18 14:23:34,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747187044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378382794] [2022-01-18 14:23:34,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:23:34,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:34,727 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:34,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 14:23:34,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:23:34,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:34,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:34,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378382794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:35,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:35,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2022-01-18 14:23:35,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381187824] [2022-01-18 14:23:35,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:35,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:23:35,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:23:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:35,131 INFO L87 Difference]: Start difference. First operand 53037 states and 135316 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:35,529 INFO L93 Difference]: Finished difference Result 55634 states and 140723 transitions. [2022-01-18 14:23:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:23:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:35,631 INFO L225 Difference]: With dead ends: 55634 [2022-01-18 14:23:35,631 INFO L226 Difference]: Without dead ends: 55580 [2022-01-18 14:23:35,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:23:35,632 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 276 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:35,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 137 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:23:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55580 states. [2022-01-18 14:23:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55580 to 42307. [2022-01-18 14:23:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42307 states, 42306 states have (on average 2.512622323074741) internal successors, (106299), 42306 states have internal predecessors, (106299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42307 states to 42307 states and 106299 transitions. [2022-01-18 14:23:36,663 INFO L78 Accepts]: Start accepts. Automaton has 42307 states and 106299 transitions. Word has length 53 [2022-01-18 14:23:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:36,663 INFO L470 AbstractCegarLoop]: Abstraction has 42307 states and 106299 transitions. [2022-01-18 14:23:36,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 42307 states and 106299 transitions. [2022-01-18 14:23:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:36,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:36,695 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:36,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-18 14:23:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 14:23:36,896 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1348383380, now seen corresponding path program 141 times [2022-01-18 14:23:36,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552883418] [2022-01-18 14:23:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:36,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:37,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552883418] [2022-01-18 14:23:37,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552883418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461306762] [2022-01-18 14:23:37,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:23:37,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:37,008 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:37,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 14:23:37,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 14:23:37,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:37,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:37,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:37,470 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:37,471 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 20 treesize of output 19 [2022-01-18 14:23:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:37,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461306762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:37,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:37,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 14:23:37,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986639068] [2022-01-18 14:23:37,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:37,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:23:37,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:23:37,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:37,573 INFO L87 Difference]: Start difference. First operand 42307 states and 106299 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:37,920 INFO L93 Difference]: Finished difference Result 43031 states and 107615 transitions. [2022-01-18 14:23:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:23:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:37,992 INFO L225 Difference]: With dead ends: 43031 [2022-01-18 14:23:37,992 INFO L226 Difference]: Without dead ends: 42996 [2022-01-18 14:23:37,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:37,992 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:37,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 145 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 708 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-18 14:23:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42996 states. [2022-01-18 14:23:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42996 to 41601. [2022-01-18 14:23:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41601 states, 41600 states have (on average 2.520985576923077) internal successors, (104873), 41600 states have internal predecessors, (104873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41601 states to 41601 states and 104873 transitions. [2022-01-18 14:23:38,946 INFO L78 Accepts]: Start accepts. Automaton has 41601 states and 104873 transitions. Word has length 53 [2022-01-18 14:23:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:38,946 INFO L470 AbstractCegarLoop]: Abstraction has 41601 states and 104873 transitions. [2022-01-18 14:23:38,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 41601 states and 104873 transitions. [2022-01-18 14:23:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:38,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:38,973 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:38,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-18 14:23:39,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-18 14:23:39,174 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash 651869474, now seen corresponding path program 142 times [2022-01-18 14:23:39,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:39,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881130929] [2022-01-18 14:23:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:39,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:23:39,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881130929] [2022-01-18 14:23:39,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881130929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121573519] [2022-01-18 14:23:39,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:39,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:39,270 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:39,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 14:23:39,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 116 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:23:39,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:39,440 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:23:39,441 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 15 [2022-01-18 14:23:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 116 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:23:39,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121573519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:39,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:39,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:23:39,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120045480] [2022-01-18 14:23:39,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:39,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:23:39,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:23:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:23:39,561 INFO L87 Difference]: Start difference. First operand 41601 states and 104873 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:40,053 INFO L93 Difference]: Finished difference Result 43162 states and 108213 transitions. [2022-01-18 14:23:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:23:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:40,126 INFO L225 Difference]: With dead ends: 43162 [2022-01-18 14:23:40,126 INFO L226 Difference]: Without dead ends: 43150 [2022-01-18 14:23:40,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:23:40,127 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 130 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:40,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 347 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:23:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43150 states. [2022-01-18 14:23:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43150 to 41577. [2022-01-18 14:23:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41577 states, 41576 states have (on average 2.5211901096786606) internal successors, (104821), 41576 states have internal predecessors, (104821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41577 states to 41577 states and 104821 transitions. [2022-01-18 14:23:41,040 INFO L78 Accepts]: Start accepts. Automaton has 41577 states and 104821 transitions. Word has length 53 [2022-01-18 14:23:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:41,041 INFO L470 AbstractCegarLoop]: Abstraction has 41577 states and 104821 transitions. [2022-01-18 14:23:41,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 41577 states and 104821 transitions. [2022-01-18 14:23:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:41,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:41,069 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:41,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-18 14:23:41,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-01-18 14:23:41,270 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:41,270 INFO L85 PathProgramCache]: Analyzing trace with hash 514555120, now seen corresponding path program 75 times [2022-01-18 14:23:41,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:41,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327332757] [2022-01-18 14:23:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:41,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:41,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327332757] [2022-01-18 14:23:41,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327332757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811744535] [2022-01-18 14:23:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:23:41,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:41,365 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:41,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 14:23:41,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 14:23:41,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:41,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:41,542 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:23:41,542 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 15 [2022-01-18 14:23:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:41,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811744535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:41,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:41,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 14:23:41,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995322307] [2022-01-18 14:23:41,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:41,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:23:41,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:23:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:23:41,658 INFO L87 Difference]: Start difference. First operand 41577 states and 104821 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:42,207 INFO L93 Difference]: Finished difference Result 44229 states and 110824 transitions. [2022-01-18 14:23:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:23:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:42,286 INFO L225 Difference]: With dead ends: 44229 [2022-01-18 14:23:42,286 INFO L226 Difference]: Without dead ends: 44183 [2022-01-18 14:23:42,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:23:42,286 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 121 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:42,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 421 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:23:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44183 states. [2022-01-18 14:23:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44183 to 42395. [2022-01-18 14:23:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42395 states, 42394 states have (on average 2.5214417134500167) internal successors, (106894), 42394 states have internal predecessors, (106894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42395 states to 42395 states and 106894 transitions. [2022-01-18 14:23:43,191 INFO L78 Accepts]: Start accepts. Automaton has 42395 states and 106894 transitions. Word has length 53 [2022-01-18 14:23:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:43,191 INFO L470 AbstractCegarLoop]: Abstraction has 42395 states and 106894 transitions. [2022-01-18 14:23:43,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 42395 states and 106894 transitions. [2022-01-18 14:23:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:43,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:43,223 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:43,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-18 14:23:43,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:43,424 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1658198774, now seen corresponding path program 143 times [2022-01-18 14:23:43,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:43,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942155729] [2022-01-18 14:23:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:43,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:43,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942155729] [2022-01-18 14:23:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942155729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008316887] [2022-01-18 14:23:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:23:43,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:43,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:43,534 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:43,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 14:23:43,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:23:43,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:43,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:43,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:43,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:43,719 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:23:43,719 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 15 [2022-01-18 14:23:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:23:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008316887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:43,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:43,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-18 14:23:43,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410332762] [2022-01-18 14:23:43,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:43,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:23:43,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:43,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:23:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:23:43,831 INFO L87 Difference]: Start difference. First operand 42395 states and 106894 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:44,487 INFO L93 Difference]: Finished difference Result 44391 states and 110584 transitions. [2022-01-18 14:23:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:23:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:44,567 INFO L225 Difference]: With dead ends: 44391 [2022-01-18 14:23:44,567 INFO L226 Difference]: Without dead ends: 44232 [2022-01-18 14:23:44,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:23:44,567 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 122 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:44,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 526 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:23:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44232 states. [2022-01-18 14:23:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44232 to 42143. [2022-01-18 14:23:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42143 states, 42142 states have (on average 2.5171325518485124) internal successors, (106077), 42142 states have internal predecessors, (106077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42143 states to 42143 states and 106077 transitions. [2022-01-18 14:23:45,562 INFO L78 Accepts]: Start accepts. Automaton has 42143 states and 106077 transitions. Word has length 53 [2022-01-18 14:23:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:45,562 INFO L470 AbstractCegarLoop]: Abstraction has 42143 states and 106077 transitions. [2022-01-18 14:23:45,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 42143 states and 106077 transitions. [2022-01-18 14:23:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:45,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:45,595 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:45,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 14:23:45,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-18 14:23:45,795 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1865932855, now seen corresponding path program 76 times [2022-01-18 14:23:45,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:45,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964523634] [2022-01-18 14:23:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:45,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:45,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964523634] [2022-01-18 14:23:45,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964523634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009316756] [2022-01-18 14:23:45,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:23:45,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:45,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:45,883 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:45,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 14:23:45,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:23:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:46,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:46,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009316756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:46,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:46,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-01-18 14:23:46,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615690978] [2022-01-18 14:23:46,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:46,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:23:46,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:23:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:23:46,536 INFO L87 Difference]: Start difference. First operand 42143 states and 106077 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:46,975 INFO L93 Difference]: Finished difference Result 45030 states and 112430 transitions. [2022-01-18 14:23:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:23:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:47,049 INFO L225 Difference]: With dead ends: 45030 [2022-01-18 14:23:47,050 INFO L226 Difference]: Without dead ends: 45014 [2022-01-18 14:23:47,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:23:47,050 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 192 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:47,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 113 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:23:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45014 states. [2022-01-18 14:23:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45014 to 42495. [2022-01-18 14:23:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42495 states, 42494 states have (on average 2.517578952322681) internal successors, (106982), 42494 states have internal predecessors, (106982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42495 states to 42495 states and 106982 transitions. [2022-01-18 14:23:48,042 INFO L78 Accepts]: Start accepts. Automaton has 42495 states and 106982 transitions. Word has length 53 [2022-01-18 14:23:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:48,042 INFO L470 AbstractCegarLoop]: Abstraction has 42495 states and 106982 transitions. [2022-01-18 14:23:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 42495 states and 106982 transitions. [2022-01-18 14:23:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:48,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:48,074 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:48,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 14:23:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-01-18 14:23:48,275 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash 374874839, now seen corresponding path program 144 times [2022-01-18 14:23:48,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982419081] [2022-01-18 14:23:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:48,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 56 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:48,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982419081] [2022-01-18 14:23:48,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982419081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146035116] [2022-01-18 14:23:48,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:23:48,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:48,384 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:48,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 14:23:48,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:23:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 56 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:48,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 56 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:48,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146035116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:48,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:48,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 13 [2022-01-18 14:23:48,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346759487] [2022-01-18 14:23:48,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:48,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:23:48,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:23:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:23:48,827 INFO L87 Difference]: Start difference. First operand 42495 states and 106982 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:49,143 INFO L93 Difference]: Finished difference Result 49165 states and 122042 transitions. [2022-01-18 14:23:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:23:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:49,225 INFO L225 Difference]: With dead ends: 49165 [2022-01-18 14:23:49,226 INFO L226 Difference]: Without dead ends: 49135 [2022-01-18 14:23:49,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:23:49,226 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:49,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 109 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:23:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49135 states. [2022-01-18 14:23:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49135 to 44435. [2022-01-18 14:23:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44435 states, 44434 states have (on average 2.533105279740739) internal successors, (112556), 44434 states have internal predecessors, (112556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44435 states to 44435 states and 112556 transitions. [2022-01-18 14:23:50,208 INFO L78 Accepts]: Start accepts. Automaton has 44435 states and 112556 transitions. Word has length 53 [2022-01-18 14:23:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:50,208 INFO L470 AbstractCegarLoop]: Abstraction has 44435 states and 112556 transitions. [2022-01-18 14:23:50,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 44435 states and 112556 transitions. [2022-01-18 14:23:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:50,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:50,241 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:50,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 14:23:50,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:50,442 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 411621591, now seen corresponding path program 145 times [2022-01-18 14:23:50,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825131054] [2022-01-18 14:23:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:50,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:50,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825131054] [2022-01-18 14:23:50,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825131054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435631286] [2022-01-18 14:23:50,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:23:50,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:50,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:50,552 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:50,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 14:23:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:50,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:50,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435631286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:50,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:50,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2022-01-18 14:23:50,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933496898] [2022-01-18 14:23:50,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:50,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:23:50,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:23:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:23:50,958 INFO L87 Difference]: Start difference. First operand 44435 states and 112556 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:51,324 INFO L93 Difference]: Finished difference Result 49363 states and 122353 transitions. [2022-01-18 14:23:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:23:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:51,414 INFO L225 Difference]: With dead ends: 49363 [2022-01-18 14:23:51,414 INFO L226 Difference]: Without dead ends: 49318 [2022-01-18 14:23:51,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:23:51,415 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 243 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:51,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 145 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:23:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49318 states. [2022-01-18 14:23:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49318 to 44435. [2022-01-18 14:23:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44435 states, 44434 states have (on average 2.5327451951208535) internal successors, (112540), 44434 states have internal predecessors, (112540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44435 states to 44435 states and 112540 transitions. [2022-01-18 14:23:52,442 INFO L78 Accepts]: Start accepts. Automaton has 44435 states and 112540 transitions. Word has length 53 [2022-01-18 14:23:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:52,442 INFO L470 AbstractCegarLoop]: Abstraction has 44435 states and 112540 transitions. [2022-01-18 14:23:52,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 44435 states and 112540 transitions. [2022-01-18 14:23:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:52,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:52,475 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:52,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 14:23:52,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:52,676 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 561431191, now seen corresponding path program 146 times [2022-01-18 14:23:52,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794395486] [2022-01-18 14:23:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:52,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:52,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794395486] [2022-01-18 14:23:52,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794395486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556371100] [2022-01-18 14:23:52,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:23:52,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:52,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:52,801 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:52,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 14:23:52,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:23:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:52,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:53,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556371100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:53,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:53,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 17 [2022-01-18 14:23:53,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625667263] [2022-01-18 14:23:53,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:53,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:23:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:23:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:23:53,376 INFO L87 Difference]: Start difference. First operand 44435 states and 112540 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:53,781 INFO L93 Difference]: Finished difference Result 50014 states and 123529 transitions. [2022-01-18 14:23:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:23:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:53,873 INFO L225 Difference]: With dead ends: 50014 [2022-01-18 14:23:53,873 INFO L226 Difference]: Without dead ends: 49951 [2022-01-18 14:23:53,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:23:53,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 256 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:53,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 185 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:23:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49951 states. [2022-01-18 14:23:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49951 to 44435. [2022-01-18 14:23:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44435 states, 44434 states have (on average 2.532362605212225) internal successors, (112523), 44434 states have internal predecessors, (112523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44435 states to 44435 states and 112523 transitions. [2022-01-18 14:23:54,860 INFO L78 Accepts]: Start accepts. Automaton has 44435 states and 112523 transitions. Word has length 53 [2022-01-18 14:23:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:54,860 INFO L470 AbstractCegarLoop]: Abstraction has 44435 states and 112523 transitions. [2022-01-18 14:23:54,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 44435 states and 112523 transitions. [2022-01-18 14:23:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:54,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:54,894 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:54,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-18 14:23:55,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:55,094 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1207858782, now seen corresponding path program 147 times [2022-01-18 14:23:55,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:55,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469953377] [2022-01-18 14:23:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:55,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:55,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469953377] [2022-01-18 14:23:55,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469953377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021891805] [2022-01-18 14:23:55,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:23:55,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:55,227 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:55,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 14:23:55,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:23:55,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:23:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:55,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:55,414 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:23:55,414 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 20 treesize of output 19 [2022-01-18 14:23:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:55,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021891805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:55,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:55,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-01-18 14:23:55,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119994118] [2022-01-18 14:23:55,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:55,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:23:55,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:23:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:23:55,484 INFO L87 Difference]: Start difference. First operand 44435 states and 112523 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:56,301 INFO L93 Difference]: Finished difference Result 50524 states and 126411 transitions. [2022-01-18 14:23:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:23:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:56,390 INFO L225 Difference]: With dead ends: 50524 [2022-01-18 14:23:56,390 INFO L226 Difference]: Without dead ends: 49222 [2022-01-18 14:23:56,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:23:56,390 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 357 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:56,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 294 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:23:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49222 states. [2022-01-18 14:23:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49222 to 41271. [2022-01-18 14:23:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41271 states, 41270 states have (on average 2.5245941361763995) internal successors, (104190), 41270 states have internal predecessors, (104190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41271 states to 41271 states and 104190 transitions. [2022-01-18 14:23:57,293 INFO L78 Accepts]: Start accepts. Automaton has 41271 states and 104190 transitions. Word has length 53 [2022-01-18 14:23:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:23:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 41271 states and 104190 transitions. [2022-01-18 14:23:57,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 41271 states and 104190 transitions. [2022-01-18 14:23:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:23:57,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:23:57,320 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:23:57,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 14:23:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:57,520 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:23:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:23:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2067800709, now seen corresponding path program 77 times [2022-01-18 14:23:57,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:23:57,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766329987] [2022-01-18 14:23:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:23:57,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:23:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:23:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:23:57,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:23:57,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766329987] [2022-01-18 14:23:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766329987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:23:57,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209857866] [2022-01-18 14:23:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:23:57,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:23:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:23:57,632 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:23:57,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 14:23:57,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:23:57,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:23:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:23:57,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:23:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:57,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:23:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:23:58,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209857866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:23:58,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:23:58,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 37 [2022-01-18 14:23:58,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516459074] [2022-01-18 14:23:58,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:23:58,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 14:23:58,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:23:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 14:23:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 14:23:58,266 INFO L87 Difference]: Start difference. First operand 41271 states and 104190 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:23:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:23:59,804 INFO L93 Difference]: Finished difference Result 47879 states and 119173 transitions. [2022-01-18 14:23:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 14:23:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:23:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:23:59,880 INFO L225 Difference]: With dead ends: 47879 [2022-01-18 14:23:59,880 INFO L226 Difference]: Without dead ends: 47879 [2022-01-18 14:23:59,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1544, Invalid=4006, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 14:23:59,880 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 921 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:23:59,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 416 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:23:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47879 states. [2022-01-18 14:24:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47879 to 42390. [2022-01-18 14:24:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42390 states, 42389 states have (on average 2.533086413928142) internal successors, (107375), 42389 states have internal predecessors, (107375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42390 states to 42390 states and 107375 transitions. [2022-01-18 14:24:00,887 INFO L78 Accepts]: Start accepts. Automaton has 42390 states and 107375 transitions. Word has length 53 [2022-01-18 14:24:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 42390 states and 107375 transitions. [2022-01-18 14:24:00,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 42390 states and 107375 transitions. [2022-01-18 14:24:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:24:00,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:00,916 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:00,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 14:24:01,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-01-18 14:24:01,116 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1100401033, now seen corresponding path program 78 times [2022-01-18 14:24:01,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:01,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485450855] [2022-01-18 14:24:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:01,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:01,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485450855] [2022-01-18 14:24:01,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485450855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839146583] [2022-01-18 14:24:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:24:01,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:01,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:01,222 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:01,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 14:24:01,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 14:24:01,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:24:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:01,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 75 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:01,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839146583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:01,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:01,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 23 [2022-01-18 14:24:01,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696091555] [2022-01-18 14:24:01,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:01,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:24:01,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:24:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:24:01,811 INFO L87 Difference]: Start difference. First operand 42390 states and 107375 transitions. Second operand has 24 states, 24 states have (on average 3.875) internal successors, (93), 23 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:02,738 INFO L93 Difference]: Finished difference Result 55951 states and 139293 transitions. [2022-01-18 14:24:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:24:02,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.875) internal successors, (93), 23 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:24:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:02,841 INFO L225 Difference]: With dead ends: 55951 [2022-01-18 14:24:02,842 INFO L226 Difference]: Without dead ends: 55930 [2022-01-18 14:24:02,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=763, Invalid=1493, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 14:24:02,842 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 519 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:02,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 273 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:24:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55930 states. [2022-01-18 14:24:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55930 to 41792. [2022-01-18 14:24:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41792 states, 41791 states have (on average 2.5292048527194853) internal successors, (105698), 41791 states have internal predecessors, (105698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41792 states to 41792 states and 105698 transitions. [2022-01-18 14:24:03,910 INFO L78 Accepts]: Start accepts. Automaton has 41792 states and 105698 transitions. Word has length 53 [2022-01-18 14:24:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:03,910 INFO L470 AbstractCegarLoop]: Abstraction has 41792 states and 105698 transitions. [2022-01-18 14:24:03,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.875) internal successors, (93), 23 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 41792 states and 105698 transitions. [2022-01-18 14:24:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 14:24:03,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:03,938 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:03,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 14:24:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 14:24:04,138 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1027497047, now seen corresponding path program 148 times [2022-01-18 14:24:04,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:04,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887854157] [2022-01-18 14:24:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:04,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:04,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:04,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887854157] [2022-01-18 14:24:04,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887854157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829259524] [2022-01-18 14:24:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:24:04,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:04,275 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:04,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 14:24:04,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:24:04,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 14:24:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:04,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829259524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:04,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:04,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2022-01-18 14:24:04,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765221183] [2022-01-18 14:24:04,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:04,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:24:04,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:24:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:24:04,720 INFO L87 Difference]: Start difference. First operand 41792 states and 105698 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:05,366 INFO L93 Difference]: Finished difference Result 45797 states and 113718 transitions. [2022-01-18 14:24:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:24:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 14:24:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:05,444 INFO L225 Difference]: With dead ends: 45797 [2022-01-18 14:24:05,444 INFO L226 Difference]: Without dead ends: 45670 [2022-01-18 14:24:05,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:24:05,444 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 288 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:05,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 282 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:24:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45670 states. [2022-01-18 14:24:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45670 to 42083. [2022-01-18 14:24:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42083 states, 42082 states have (on average 2.523097761513236) internal successors, (106177), 42082 states have internal predecessors, (106177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42083 states to 42083 states and 106177 transitions. [2022-01-18 14:24:06,470 INFO L78 Accepts]: Start accepts. Automaton has 42083 states and 106177 transitions. Word has length 53 [2022-01-18 14:24:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:06,470 INFO L470 AbstractCegarLoop]: Abstraction has 42083 states and 106177 transitions. [2022-01-18 14:24:06,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 42083 states and 106177 transitions. [2022-01-18 14:24:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:06,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:06,502 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:06,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-18 14:24:06,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-18 14:24:06,702 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash 854644609, now seen corresponding path program 79 times [2022-01-18 14:24:06,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:06,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601266760] [2022-01-18 14:24:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:06,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:06,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:06,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601266760] [2022-01-18 14:24:06,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601266760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:06,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219318661] [2022-01-18 14:24:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:24:06,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:06,785 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:06,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 14:24:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:24:06,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:07,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:07,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219318661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:07,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:07,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2022-01-18 14:24:07,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429222935] [2022-01-18 14:24:07,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:07,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:24:07,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:24:07,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:24:07,266 INFO L87 Difference]: Start difference. First operand 42083 states and 106177 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:08,395 INFO L93 Difference]: Finished difference Result 47568 states and 117522 transitions. [2022-01-18 14:24:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:24:08,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:08,474 INFO L225 Difference]: With dead ends: 47568 [2022-01-18 14:24:08,474 INFO L226 Difference]: Without dead ends: 47537 [2022-01-18 14:24:08,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 14:24:08,474 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 506 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:08,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 889 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:24:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47537 states. [2022-01-18 14:24:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47537 to 42841. [2022-01-18 14:24:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42841 states, 42840 states have (on average 2.5153828197945844) internal successors, (107759), 42840 states have internal predecessors, (107759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42841 states to 42841 states and 107759 transitions. [2022-01-18 14:24:09,421 INFO L78 Accepts]: Start accepts. Automaton has 42841 states and 107759 transitions. Word has length 56 [2022-01-18 14:24:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:09,422 INFO L470 AbstractCegarLoop]: Abstraction has 42841 states and 107759 transitions. [2022-01-18 14:24:09,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 42841 states and 107759 transitions. [2022-01-18 14:24:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:09,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:09,455 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:09,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 14:24:09,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 14:24:09,656 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2139801855, now seen corresponding path program 80 times [2022-01-18 14:24:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:09,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740756844] [2022-01-18 14:24:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:09,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:24:09,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:09,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740756844] [2022-01-18 14:24:09,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740756844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:09,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106042717] [2022-01-18 14:24:09,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:24:09,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:09,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:09,738 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:09,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 14:24:09,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:24:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:09,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:24:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 86 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:09,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 86 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106042717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:10,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2022-01-18 14:24:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682456807] [2022-01-18 14:24:10,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:24:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:24:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:24:10,229 INFO L87 Difference]: Start difference. First operand 42841 states and 107759 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:11,073 INFO L93 Difference]: Finished difference Result 47876 states and 118161 transitions. [2022-01-18 14:24:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:24:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:11,156 INFO L225 Difference]: With dead ends: 47876 [2022-01-18 14:24:11,156 INFO L226 Difference]: Without dead ends: 47787 [2022-01-18 14:24:11,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:24:11,156 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 337 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:11,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 738 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:24:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47787 states. [2022-01-18 14:24:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47787 to 42837. [2022-01-18 14:24:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42837 states, 42836 states have (on average 2.5140302549257636) internal successors, (107691), 42836 states have internal predecessors, (107691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42837 states to 42837 states and 107691 transitions. [2022-01-18 14:24:12,132 INFO L78 Accepts]: Start accepts. Automaton has 42837 states and 107691 transitions. Word has length 56 [2022-01-18 14:24:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:12,132 INFO L470 AbstractCegarLoop]: Abstraction has 42837 states and 107691 transitions. [2022-01-18 14:24:12,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 42837 states and 107691 transitions. [2022-01-18 14:24:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:12,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:12,167 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:12,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-18 14:24:12,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 14:24:12,367 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:12,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1961045381, now seen corresponding path program 5 times [2022-01-18 14:24:12,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:12,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390049671] [2022-01-18 14:24:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:12,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:12,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390049671] [2022-01-18 14:24:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390049671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975549766] [2022-01-18 14:24:12,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:24:12,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:12,537 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:12,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 14:24:12,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 14:24:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:24:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:13,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:13,194 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:13,194 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 20 treesize of output 19 [2022-01-18 14:24:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:13,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975549766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:13,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:13,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-01-18 14:24:13,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087199146] [2022-01-18 14:24:13,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:13,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 14:24:13,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 14:24:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:24:13,262 INFO L87 Difference]: Start difference. First operand 42837 states and 107691 transitions. Second operand has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:13,651 INFO L93 Difference]: Finished difference Result 42949 states and 107867 transitions. [2022-01-18 14:24:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:24:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:13,727 INFO L225 Difference]: With dead ends: 42949 [2022-01-18 14:24:13,727 INFO L226 Difference]: Without dead ends: 42765 [2022-01-18 14:24:13,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:24:13,727 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:13,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 231 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 798 Invalid, 0 Unknown, 403 Unchecked, 0.3s Time] [2022-01-18 14:24:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42765 states. [2022-01-18 14:24:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42765 to 42765. [2022-01-18 14:24:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42765 states, 42764 states have (on average 2.513258815826396) internal successors, (107477), 42764 states have internal predecessors, (107477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42765 states to 42765 states and 107477 transitions. [2022-01-18 14:24:14,690 INFO L78 Accepts]: Start accepts. Automaton has 42765 states and 107477 transitions. Word has length 56 [2022-01-18 14:24:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:14,690 INFO L470 AbstractCegarLoop]: Abstraction has 42765 states and 107477 transitions. [2022-01-18 14:24:14,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 42765 states and 107477 transitions. [2022-01-18 14:24:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:14,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:14,724 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:14,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-18 14:24:14,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:14,924 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash -910068223, now seen corresponding path program 81 times [2022-01-18 14:24:14,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:14,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496909697] [2022-01-18 14:24:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:14,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:24:15,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:15,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496909697] [2022-01-18 14:24:15,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496909697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:15,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791821707] [2022-01-18 14:24:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:15,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:15,008 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:15,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 14:24:15,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 14:24:15,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 14:24:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:24:15,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:24:15,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791821707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:15,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:15,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-18 14:24:15,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175156558] [2022-01-18 14:24:15,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:15,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:24:15,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:24:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:15,335 INFO L87 Difference]: Start difference. First operand 42765 states and 107477 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:15,757 INFO L93 Difference]: Finished difference Result 44586 states and 111323 transitions. [2022-01-18 14:24:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:24:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:15,828 INFO L225 Difference]: With dead ends: 44586 [2022-01-18 14:24:15,828 INFO L226 Difference]: Without dead ends: 44549 [2022-01-18 14:24:15,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:15,828 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 93 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:15,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 345 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:24:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44549 states. [2022-01-18 14:24:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44549 to 43223. [2022-01-18 14:24:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43223 states, 43222 states have (on average 2.51052704641155) internal successors, (108510), 43222 states have internal predecessors, (108510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43223 states to 43223 states and 108510 transitions. [2022-01-18 14:24:16,707 INFO L78 Accepts]: Start accepts. Automaton has 43223 states and 108510 transitions. Word has length 56 [2022-01-18 14:24:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:16,707 INFO L470 AbstractCegarLoop]: Abstraction has 43223 states and 108510 transitions. [2022-01-18 14:24:16,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43223 states and 108510 transitions. [2022-01-18 14:24:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:16,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:16,742 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:16,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-18 14:24:16,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:16,942 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1118816398, now seen corresponding path program 149 times [2022-01-18 14:24:16,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670817301] [2022-01-18 14:24:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:16,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:17,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670817301] [2022-01-18 14:24:17,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670817301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614557296] [2022-01-18 14:24:17,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:24:17,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:17,026 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:17,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 14:24:17,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 14:24:17,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:17,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 14:24:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:17,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:17,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614557296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:17,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:17,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-18 14:24:17,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844686120] [2022-01-18 14:24:17,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:17,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:24:17,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:24:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:17,349 INFO L87 Difference]: Start difference. First operand 43223 states and 108510 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:17,779 INFO L93 Difference]: Finished difference Result 44588 states and 111328 transitions. [2022-01-18 14:24:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:24:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:17,851 INFO L225 Difference]: With dead ends: 44588 [2022-01-18 14:24:17,852 INFO L226 Difference]: Without dead ends: 44525 [2022-01-18 14:24:17,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:17,852 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 94 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:17,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 363 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:24:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44525 states. [2022-01-18 14:24:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44525 to 42647. [2022-01-18 14:24:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42647 states, 42646 states have (on average 2.5153121043005204) internal successors, (107268), 42646 states have internal predecessors, (107268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42647 states to 42647 states and 107268 transitions. [2022-01-18 14:24:18,765 INFO L78 Accepts]: Start accepts. Automaton has 42647 states and 107268 transitions. Word has length 56 [2022-01-18 14:24:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:18,765 INFO L470 AbstractCegarLoop]: Abstraction has 42647 states and 107268 transitions. [2022-01-18 14:24:18,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 42647 states and 107268 transitions. [2022-01-18 14:24:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:18,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:18,800 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:18,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-01-18 14:24:19,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-18 14:24:19,000 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash -295980990, now seen corresponding path program 150 times [2022-01-18 14:24:19,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:19,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469498858] [2022-01-18 14:24:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:19,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:19,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469498858] [2022-01-18 14:24:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469498858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533571206] [2022-01-18 14:24:19,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:24:19,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:19,082 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:19,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 14:24:19,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 14:24:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:24:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 47 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:19,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 47 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:19,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533571206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:19,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:19,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-01-18 14:24:19,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624191837] [2022-01-18 14:24:19,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:19,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:24:19,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:24:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:19,583 INFO L87 Difference]: Start difference. First operand 42647 states and 107268 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:20,590 INFO L93 Difference]: Finished difference Result 47478 states and 117101 transitions. [2022-01-18 14:24:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:24:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:20,692 INFO L225 Difference]: With dead ends: 47478 [2022-01-18 14:24:20,692 INFO L226 Difference]: Without dead ends: 47386 [2022-01-18 14:24:20,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:24:20,693 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 334 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:20,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 679 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:24:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47386 states. [2022-01-18 14:24:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47386 to 42687. [2022-01-18 14:24:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42687 states, 42686 states have (on average 2.512439675771916) internal successors, (107246), 42686 states have internal predecessors, (107246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42687 states to 42687 states and 107246 transitions. [2022-01-18 14:24:21,502 INFO L78 Accepts]: Start accepts. Automaton has 42687 states and 107246 transitions. Word has length 56 [2022-01-18 14:24:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:21,502 INFO L470 AbstractCegarLoop]: Abstraction has 42687 states and 107246 transitions. [2022-01-18 14:24:21,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 42687 states and 107246 transitions. [2022-01-18 14:24:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:21,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:21,705 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:21,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-18 14:24:21,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:21,906 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 201032270, now seen corresponding path program 151 times [2022-01-18 14:24:21,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:21,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834049876] [2022-01-18 14:24:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:21,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:21,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834049876] [2022-01-18 14:24:21,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834049876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333964638] [2022-01-18 14:24:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:24:21,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:21,993 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:21,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 14:24:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 14:24:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:22,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:22,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333964638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:22,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:22,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-18 14:24:22,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594603236] [2022-01-18 14:24:22,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:22,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:24:22,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:24:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:22,311 INFO L87 Difference]: Start difference. First operand 42687 states and 107246 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:22,746 INFO L93 Difference]: Finished difference Result 43964 states and 109917 transitions. [2022-01-18 14:24:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:24:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:22,840 INFO L225 Difference]: With dead ends: 43964 [2022-01-18 14:24:22,841 INFO L226 Difference]: Without dead ends: 43910 [2022-01-18 14:24:22,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:22,841 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 96 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:22,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 363 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:24:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43910 states. [2022-01-18 14:24:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43910 to 42757. [2022-01-18 14:24:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42757 states, 42756 states have (on average 2.5104780615586115) internal successors, (107338), 42756 states have internal predecessors, (107338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42757 states to 42757 states and 107338 transitions. [2022-01-18 14:24:23,749 INFO L78 Accepts]: Start accepts. Automaton has 42757 states and 107338 transitions. Word has length 56 [2022-01-18 14:24:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:23,749 INFO L470 AbstractCegarLoop]: Abstraction has 42757 states and 107338 transitions. [2022-01-18 14:24:23,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42757 states and 107338 transitions. [2022-01-18 14:24:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:23,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:23,784 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:23,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 14:24:23,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:23,985 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -241131902, now seen corresponding path program 152 times [2022-01-18 14:24:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:23,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520999914] [2022-01-18 14:24:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:23,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:24,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520999914] [2022-01-18 14:24:24,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520999914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913953600] [2022-01-18 14:24:24,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:24:24,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:24,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:24,068 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:24,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 14:24:24,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:24:24,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:24,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 14:24:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:24,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:24:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913953600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:24,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:24,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-18 14:24:24,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67029699] [2022-01-18 14:24:24,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:24,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:24:24,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:24:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:24,386 INFO L87 Difference]: Start difference. First operand 42757 states and 107338 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:24,832 INFO L93 Difference]: Finished difference Result 45317 states and 112773 transitions. [2022-01-18 14:24:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:24:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:24,909 INFO L225 Difference]: With dead ends: 45317 [2022-01-18 14:24:24,909 INFO L226 Difference]: Without dead ends: 45229 [2022-01-18 14:24:24,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:24:24,910 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 97 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:24,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 363 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:24:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45229 states. [2022-01-18 14:24:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45229 to 43417. [2022-01-18 14:24:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43417 states, 43416 states have (on average 2.5045374976967016) internal successors, (108737), 43416 states have internal predecessors, (108737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43417 states to 43417 states and 108737 transitions. [2022-01-18 14:24:25,805 INFO L78 Accepts]: Start accepts. Automaton has 43417 states and 108737 transitions. Word has length 56 [2022-01-18 14:24:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:25,805 INFO L470 AbstractCegarLoop]: Abstraction has 43417 states and 108737 transitions. [2022-01-18 14:24:25,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 43417 states and 108737 transitions. [2022-01-18 14:24:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:25,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:25,840 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:25,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 14:24:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:26,040 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1000572127, now seen corresponding path program 6 times [2022-01-18 14:24:26,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:26,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349441502] [2022-01-18 14:24:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:26,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:26,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349441502] [2022-01-18 14:24:26,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349441502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379833837] [2022-01-18 14:24:26,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:24:26,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:26,201 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:26,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 14:24:26,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 14:24:26,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:26,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:24:26,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:26,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:26,657 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:26,657 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 20 treesize of output 19 [2022-01-18 14:24:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:26,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379833837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:26,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:26,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-01-18 14:24:26,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497379129] [2022-01-18 14:24:26,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:26,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:24:26,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:24:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:24:26,727 INFO L87 Difference]: Start difference. First operand 43417 states and 108737 transitions. Second operand has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:27,076 INFO L93 Difference]: Finished difference Result 44254 states and 110398 transitions. [2022-01-18 14:24:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:24:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:27,149 INFO L225 Difference]: With dead ends: 44254 [2022-01-18 14:24:27,150 INFO L226 Difference]: Without dead ends: 44183 [2022-01-18 14:24:27,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:24:27,150 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:27,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 208 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 694 Invalid, 0 Unknown, 244 Unchecked, 0.2s Time] [2022-01-18 14:24:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44183 states. [2022-01-18 14:24:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44183 to 44014. [2022-01-18 14:24:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44014 states, 44013 states have (on average 2.4976938631767887) internal successors, (109931), 44013 states have internal predecessors, (109931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44014 states to 44014 states and 109931 transitions. [2022-01-18 14:24:28,070 INFO L78 Accepts]: Start accepts. Automaton has 44014 states and 109931 transitions. Word has length 56 [2022-01-18 14:24:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:28,070 INFO L470 AbstractCegarLoop]: Abstraction has 44014 states and 109931 transitions. [2022-01-18 14:24:28,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 44014 states and 109931 transitions. [2022-01-18 14:24:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:28,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:28,106 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:28,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 14:24:28,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-01-18 14:24:28,306 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1541496317, now seen corresponding path program 7 times [2022-01-18 14:24:28,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:28,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011105667] [2022-01-18 14:24:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:28,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:28,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:28,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011105667] [2022-01-18 14:24:28,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011105667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:28,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821170367] [2022-01-18 14:24:28,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:24:28,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:28,455 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:28,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 14:24:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:24:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:28,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:28,883 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:28,884 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 20 treesize of output 19 [2022-01-18 14:24:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:28,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821170367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:28,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:28,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-01-18 14:24:28,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167606481] [2022-01-18 14:24:28,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:28,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:24:28,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:24:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:24:28,959 INFO L87 Difference]: Start difference. First operand 44014 states and 109931 transitions. Second operand has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:29,722 INFO L93 Difference]: Finished difference Result 44736 states and 111215 transitions. [2022-01-18 14:24:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:24:29,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:29,796 INFO L225 Difference]: With dead ends: 44736 [2022-01-18 14:24:29,796 INFO L226 Difference]: Without dead ends: 44600 [2022-01-18 14:24:29,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:24:29,796 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:29,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 389 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1058 Invalid, 0 Unknown, 261 Unchecked, 0.3s Time] [2022-01-18 14:24:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44600 states. [2022-01-18 14:24:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44600 to 44010. [2022-01-18 14:24:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44010 states, 44009 states have (on average 2.497466427321684) internal successors, (109911), 44009 states have internal predecessors, (109911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44010 states to 44010 states and 109911 transitions. [2022-01-18 14:24:30,802 INFO L78 Accepts]: Start accepts. Automaton has 44010 states and 109911 transitions. Word has length 56 [2022-01-18 14:24:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:30,802 INFO L470 AbstractCegarLoop]: Abstraction has 44010 states and 109911 transitions. [2022-01-18 14:24:30,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 44010 states and 109911 transitions. [2022-01-18 14:24:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:30,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:30,833 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:30,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:31,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:31,034 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash 994037292, now seen corresponding path program 82 times [2022-01-18 14:24:31,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:31,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447063596] [2022-01-18 14:24:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:31,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:31,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447063596] [2022-01-18 14:24:31,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447063596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105648685] [2022-01-18 14:24:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:24:31,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:31,154 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:31,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 14:24:31,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:24:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:24:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:31,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:31,345 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:31,345 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 20 treesize of output 19 [2022-01-18 14:24:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:24:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105648685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:31,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:31,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:24:31,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790798899] [2022-01-18 14:24:31,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:31,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:24:31,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:24:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:24:31,426 INFO L87 Difference]: Start difference. First operand 44010 states and 109911 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:32,132 INFO L93 Difference]: Finished difference Result 57175 states and 139958 transitions. [2022-01-18 14:24:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:24:32,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:32,233 INFO L225 Difference]: With dead ends: 57175 [2022-01-18 14:24:32,233 INFO L226 Difference]: Without dead ends: 57175 [2022-01-18 14:24:32,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:24:32,234 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 171 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:32,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 388 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:24:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57175 states. [2022-01-18 14:24:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57175 to 38638. [2022-01-18 14:24:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38638 states, 38637 states have (on average 2.50229055050858) internal successors, (96681), 38637 states have internal predecessors, (96681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38638 states to 38638 states and 96681 transitions. [2022-01-18 14:24:33,192 INFO L78 Accepts]: Start accepts. Automaton has 38638 states and 96681 transitions. Word has length 56 [2022-01-18 14:24:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:33,192 INFO L470 AbstractCegarLoop]: Abstraction has 38638 states and 96681 transitions. [2022-01-18 14:24:33,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 38638 states and 96681 transitions. [2022-01-18 14:24:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:33,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:33,220 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:33,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 14:24:33,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 14:24:33,420 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1153619527, now seen corresponding path program 8 times [2022-01-18 14:24:33,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:33,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002491627] [2022-01-18 14:24:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:33,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:33,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:33,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002491627] [2022-01-18 14:24:33,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002491627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:33,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970638898] [2022-01-18 14:24:33,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:24:33,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:33,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:33,576 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:33,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 14:24:33,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:24:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:24:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:33,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:33,962 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:33,963 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 20 treesize of output 19 [2022-01-18 14:24:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970638898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:34,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:34,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-01-18 14:24:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300616449] [2022-01-18 14:24:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:34,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:24:34,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:24:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:24:34,044 INFO L87 Difference]: Start difference. First operand 38638 states and 96681 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:34,597 INFO L93 Difference]: Finished difference Result 39269 states and 97802 transitions. [2022-01-18 14:24:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:24:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:34,659 INFO L225 Difference]: With dead ends: 39269 [2022-01-18 14:24:34,659 INFO L226 Difference]: Without dead ends: 39070 [2022-01-18 14:24:34,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:24:34,659 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:34,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 456 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1276 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2022-01-18 14:24:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39070 states. [2022-01-18 14:24:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39070 to 38530. [2022-01-18 14:24:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38530 states, 38529 states have (on average 2.4971060759427965) internal successors, (96211), 38529 states have internal predecessors, (96211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38530 states to 38530 states and 96211 transitions. [2022-01-18 14:24:35,433 INFO L78 Accepts]: Start accepts. Automaton has 38530 states and 96211 transitions. Word has length 56 [2022-01-18 14:24:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:35,433 INFO L470 AbstractCegarLoop]: Abstraction has 38530 states and 96211 transitions. [2022-01-18 14:24:35,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38530 states and 96211 transitions. [2022-01-18 14:24:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:35,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:35,460 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:35,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 14:24:35,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 14:24:35,661 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 407159329, now seen corresponding path program 9 times [2022-01-18 14:24:35,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:35,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303597382] [2022-01-18 14:24:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:35,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:35,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303597382] [2022-01-18 14:24:35,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303597382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149968456] [2022-01-18 14:24:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:35,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:35,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:35,800 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:35,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 14:24:35,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 14:24:35,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 14:24:35,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:36,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:36,162 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:36,162 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 20 treesize of output 19 [2022-01-18 14:24:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149968456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:36,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:36,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 14:24:36,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715037741] [2022-01-18 14:24:36,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:36,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 14:24:36,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 14:24:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:24:36,252 INFO L87 Difference]: Start difference. First operand 38530 states and 96211 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:36,577 INFO L93 Difference]: Finished difference Result 39282 states and 97714 transitions. [2022-01-18 14:24:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:24:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:36,641 INFO L225 Difference]: With dead ends: 39282 [2022-01-18 14:24:36,641 INFO L226 Difference]: Without dead ends: 39233 [2022-01-18 14:24:36,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:24:36,641 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:36,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 161 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 681 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-01-18 14:24:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39233 states. [2022-01-18 14:24:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39233 to 38659. [2022-01-18 14:24:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38659 states, 38658 states have (on average 2.495447255419318) internal successors, (96469), 38658 states have internal predecessors, (96469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38659 states to 38659 states and 96469 transitions. [2022-01-18 14:24:37,396 INFO L78 Accepts]: Start accepts. Automaton has 38659 states and 96469 transitions. Word has length 56 [2022-01-18 14:24:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:37,397 INFO L470 AbstractCegarLoop]: Abstraction has 38659 states and 96469 transitions. [2022-01-18 14:24:37,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 38659 states and 96469 transitions. [2022-01-18 14:24:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 14:24:37,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:37,429 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:37,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-18 14:24:37,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:37,630 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2122640398, now seen corresponding path program 153 times [2022-01-18 14:24:37,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669151453] [2022-01-18 14:24:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:37,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:24:37,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669151453] [2022-01-18 14:24:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669151453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946664919] [2022-01-18 14:24:37,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:37,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:37,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:37,711 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:37,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 14:24:37,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:24:37,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:24:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946664919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:38,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:38,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-01-18 14:24:38,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538149776] [2022-01-18 14:24:38,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:24:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:24:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:38,241 INFO L87 Difference]: Start difference. First operand 38659 states and 96469 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:39,392 INFO L93 Difference]: Finished difference Result 44958 states and 109419 transitions. [2022-01-18 14:24:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 14:24:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 14:24:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:39,641 INFO L225 Difference]: With dead ends: 44958 [2022-01-18 14:24:39,642 INFO L226 Difference]: Without dead ends: 44925 [2022-01-18 14:24:39,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:24:39,642 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 430 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:39,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 845 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:24:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44925 states. [2022-01-18 14:24:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44925 to 38798. [2022-01-18 14:24:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38798 states, 38797 states have (on average 2.493130912183932) internal successors, (96726), 38797 states have internal predecessors, (96726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38798 states to 38798 states and 96726 transitions. [2022-01-18 14:24:40,276 INFO L78 Accepts]: Start accepts. Automaton has 38798 states and 96726 transitions. Word has length 56 [2022-01-18 14:24:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:40,276 INFO L470 AbstractCegarLoop]: Abstraction has 38798 states and 96726 transitions. [2022-01-18 14:24:40,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 38798 states and 96726 transitions. [2022-01-18 14:24:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:40,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:40,311 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:40,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-18 14:24:40,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:40,511 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash 362695637, now seen corresponding path program 83 times [2022-01-18 14:24:40,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915554130] [2022-01-18 14:24:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:40,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:40,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915554130] [2022-01-18 14:24:40,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915554130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472223790] [2022-01-18 14:24:40,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:24:40,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:40,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:40,672 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:40,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 14:24:40,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:24:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:40,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:40,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:40,882 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:40,882 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 20 treesize of output 19 [2022-01-18 14:24:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472223790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:40,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:40,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 18 [2022-01-18 14:24:40,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577205648] [2022-01-18 14:24:40,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:40,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:24:40,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:40,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:24:40,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:40,960 INFO L87 Difference]: Start difference. First operand 38798 states and 96726 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:42,173 INFO L93 Difference]: Finished difference Result 46231 states and 113844 transitions. [2022-01-18 14:24:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:24:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:42,247 INFO L225 Difference]: With dead ends: 46231 [2022-01-18 14:24:42,247 INFO L226 Difference]: Without dead ends: 46014 [2022-01-18 14:24:42,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:24:42,248 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 734 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:42,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 881 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:24:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46014 states. [2022-01-18 14:24:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46014 to 37947. [2022-01-18 14:24:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37947 states, 37946 states have (on average 2.4927001528487853) internal successors, (94588), 37946 states have internal predecessors, (94588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37947 states to 37947 states and 94588 transitions. [2022-01-18 14:24:43,163 INFO L78 Accepts]: Start accepts. Automaton has 37947 states and 94588 transitions. Word has length 59 [2022-01-18 14:24:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:43,163 INFO L470 AbstractCegarLoop]: Abstraction has 37947 states and 94588 transitions. [2022-01-18 14:24:43,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 37947 states and 94588 transitions. [2022-01-18 14:24:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:43,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:43,193 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:43,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:43,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-18 14:24:43,394 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2140362389, now seen corresponding path program 154 times [2022-01-18 14:24:43,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:43,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927744731] [2022-01-18 14:24:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:43,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 159 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:43,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927744731] [2022-01-18 14:24:43,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927744731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792069481] [2022-01-18 14:24:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:24:43,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:43,517 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:43,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 14:24:43,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:24:43,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:43,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:43,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:43,827 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:43,827 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 20 treesize of output 19 [2022-01-18 14:24:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:43,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792069481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:43,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:43,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-01-18 14:24:43,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481471178] [2022-01-18 14:24:43,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:43,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:24:43,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:43,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:24:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:43,947 INFO L87 Difference]: Start difference. First operand 37947 states and 94588 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:44,486 INFO L93 Difference]: Finished difference Result 38672 states and 95868 transitions. [2022-01-18 14:24:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:24:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:44,549 INFO L225 Difference]: With dead ends: 38672 [2022-01-18 14:24:44,549 INFO L226 Difference]: Without dead ends: 38580 [2022-01-18 14:24:44,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:44,550 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:44,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 500 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1297 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-01-18 14:24:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38580 states. [2022-01-18 14:24:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38580 to 37956. [2022-01-18 14:24:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37956 states, 37955 states have (on average 2.491819259649585) internal successors, (94577), 37955 states have internal predecessors, (94577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37956 states to 37956 states and 94577 transitions. [2022-01-18 14:24:45,389 INFO L78 Accepts]: Start accepts. Automaton has 37956 states and 94577 transitions. Word has length 59 [2022-01-18 14:24:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:45,389 INFO L470 AbstractCegarLoop]: Abstraction has 37956 states and 94577 transitions. [2022-01-18 14:24:45,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 37956 states and 94577 transitions. [2022-01-18 14:24:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:45,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:45,422 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:45,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-18 14:24:45,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:45,623 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -640915359, now seen corresponding path program 155 times [2022-01-18 14:24:45,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:45,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444639663] [2022-01-18 14:24:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:45,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:45,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:45,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444639663] [2022-01-18 14:24:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444639663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:45,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473567541] [2022-01-18 14:24:45,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:24:45,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:45,734 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:45,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 14:24:45,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 14:24:45,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:45,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:45,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:24:45,931 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 15 [2022-01-18 14:24:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473567541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:46,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:46,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:24:46,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141751864] [2022-01-18 14:24:46,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:46,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:24:46,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:24:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:24:46,070 INFO L87 Difference]: Start difference. First operand 37956 states and 94577 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:46,606 INFO L93 Difference]: Finished difference Result 39103 states and 96888 transitions. [2022-01-18 14:24:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:24:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:46,675 INFO L225 Difference]: With dead ends: 39103 [2022-01-18 14:24:46,675 INFO L226 Difference]: Without dead ends: 39073 [2022-01-18 14:24:46,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:46,675 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:46,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 353 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:24:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39073 states. [2022-01-18 14:24:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39073 to 37917. [2022-01-18 14:24:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37917 states, 37916 states have (on average 2.492483384323241) internal successors, (94505), 37916 states have internal predecessors, (94505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37917 states to 37917 states and 94505 transitions. [2022-01-18 14:24:47,472 INFO L78 Accepts]: Start accepts. Automaton has 37917 states and 94505 transitions. Word has length 59 [2022-01-18 14:24:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:47,472 INFO L470 AbstractCegarLoop]: Abstraction has 37917 states and 94505 transitions. [2022-01-18 14:24:47,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 37917 states and 94505 transitions. [2022-01-18 14:24:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:47,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:47,506 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:47,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:47,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:47,706 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash 23633323, now seen corresponding path program 156 times [2022-01-18 14:24:47,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:47,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859536962] [2022-01-18 14:24:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:47,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 159 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:47,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859536962] [2022-01-18 14:24:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859536962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655990256] [2022-01-18 14:24:47,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:24:47,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:47,842 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:47,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 14:24:47,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 14:24:47,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:48,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:48,193 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:48,193 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 20 treesize of output 19 [2022-01-18 14:24:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655990256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:48,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:48,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-01-18 14:24:48,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644412870] [2022-01-18 14:24:48,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:48,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:24:48,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:24:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:24:48,307 INFO L87 Difference]: Start difference. First operand 37917 states and 94505 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:48,911 INFO L93 Difference]: Finished difference Result 38668 states and 95824 transitions. [2022-01-18 14:24:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:24:48,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:48,975 INFO L225 Difference]: With dead ends: 38668 [2022-01-18 14:24:48,975 INFO L226 Difference]: Without dead ends: 38568 [2022-01-18 14:24:48,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:24:48,976 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 114 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:48,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 576 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1499 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-01-18 14:24:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38568 states. [2022-01-18 14:24:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38568 to 37899. [2022-01-18 14:24:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37899 states, 37898 states have (on average 2.49232149453797) internal successors, (94454), 37898 states have internal predecessors, (94454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37899 states to 37899 states and 94454 transitions. [2022-01-18 14:24:49,751 INFO L78 Accepts]: Start accepts. Automaton has 37899 states and 94454 transitions. Word has length 59 [2022-01-18 14:24:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:49,751 INFO L470 AbstractCegarLoop]: Abstraction has 37899 states and 94454 transitions. [2022-01-18 14:24:49,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 37899 states and 94454 transitions. [2022-01-18 14:24:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:49,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:49,790 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:49,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-18 14:24:49,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:49,990 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash 409429512, now seen corresponding path program 157 times [2022-01-18 14:24:49,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:49,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032803373] [2022-01-18 14:24:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:49,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:24:50,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032803373] [2022-01-18 14:24:50,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032803373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225233989] [2022-01-18 14:24:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:24:50,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:50,092 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:50,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 14:24:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:24:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:50,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:50,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225233989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:50,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:50,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-01-18 14:24:50,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429899986] [2022-01-18 14:24:50,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:50,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:24:50,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:24:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:24:50,543 INFO L87 Difference]: Start difference. First operand 37899 states and 94454 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:50,869 INFO L93 Difference]: Finished difference Result 39638 states and 98007 transitions. [2022-01-18 14:24:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:24:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:50,936 INFO L225 Difference]: With dead ends: 39638 [2022-01-18 14:24:50,936 INFO L226 Difference]: Without dead ends: 39608 [2022-01-18 14:24:50,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:24:50,936 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:50,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 113 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:24:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39608 states. [2022-01-18 14:24:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39608 to 37133. [2022-01-18 14:24:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37133 states, 37132 states have (on average 2.4829796402025206) internal successors, (92198), 37132 states have internal predecessors, (92198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37133 states to 37133 states and 92198 transitions. [2022-01-18 14:24:51,787 INFO L78 Accepts]: Start accepts. Automaton has 37133 states and 92198 transitions. Word has length 59 [2022-01-18 14:24:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:51,788 INFO L470 AbstractCegarLoop]: Abstraction has 37133 states and 92198 transitions. [2022-01-18 14:24:51,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 37133 states and 92198 transitions. [2022-01-18 14:24:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:51,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:51,824 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:51,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 14:24:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2022-01-18 14:24:52,025 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1514859323, now seen corresponding path program 84 times [2022-01-18 14:24:52,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:52,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098507191] [2022-01-18 14:24:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:52,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:52,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098507191] [2022-01-18 14:24:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098507191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798792374] [2022-01-18 14:24:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:24:52,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:52,136 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:52,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 14:24:52,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 14:24:52,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:52,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:52,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:52,350 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:24:52,350 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 15 [2022-01-18 14:24:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:52,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798792374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:52,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:52,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:24:52,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658355347] [2022-01-18 14:24:52,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:52,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:24:52,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:24:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:24:52,488 INFO L87 Difference]: Start difference. First operand 37133 states and 92198 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:53,106 INFO L93 Difference]: Finished difference Result 39790 states and 97696 transitions. [2022-01-18 14:24:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:24:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:53,172 INFO L225 Difference]: With dead ends: 39790 [2022-01-18 14:24:53,172 INFO L226 Difference]: Without dead ends: 39731 [2022-01-18 14:24:53,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:53,173 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 218 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:53,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 579 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:24:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39731 states. [2022-01-18 14:24:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39731 to 37455. [2022-01-18 14:24:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37455 states, 37454 states have (on average 2.4827521760025633) internal successors, (92989), 37454 states have internal predecessors, (92989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37455 states to 37455 states and 92989 transitions. [2022-01-18 14:24:54,054 INFO L78 Accepts]: Start accepts. Automaton has 37455 states and 92989 transitions. Word has length 59 [2022-01-18 14:24:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:54,054 INFO L470 AbstractCegarLoop]: Abstraction has 37455 states and 92989 transitions. [2022-01-18 14:24:54,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 37455 states and 92989 transitions. [2022-01-18 14:24:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:54,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:54,088 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:54,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 14:24:54,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:54,289 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash -657894571, now seen corresponding path program 158 times [2022-01-18 14:24:54,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561089106] [2022-01-18 14:24:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:54,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:54,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:54,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561089106] [2022-01-18 14:24:54,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561089106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:54,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187103723] [2022-01-18 14:24:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:24:54,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:54,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:54,400 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:54,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 14:24:54,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:24:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:54,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:54,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:24:54,606 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 15 [2022-01-18 14:24:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:24:54,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187103723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:54,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:54,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-01-18 14:24:54,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184138969] [2022-01-18 14:24:54,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:54,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:24:54,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:24:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:24:54,744 INFO L87 Difference]: Start difference. First operand 37455 states and 92989 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:55,409 INFO L93 Difference]: Finished difference Result 38736 states and 95387 transitions. [2022-01-18 14:24:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:24:55,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:55,474 INFO L225 Difference]: With dead ends: 38736 [2022-01-18 14:24:55,474 INFO L226 Difference]: Without dead ends: 38686 [2022-01-18 14:24:55,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:55,474 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 123 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:55,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 518 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:24:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38686 states. [2022-01-18 14:24:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38686 to 37449. [2022-01-18 14:24:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37449 states, 37448 states have (on average 2.482188634907071) internal successors, (92953), 37448 states have internal predecessors, (92953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37449 states to 37449 states and 92953 transitions. [2022-01-18 14:24:56,324 INFO L78 Accepts]: Start accepts. Automaton has 37449 states and 92953 transitions. Word has length 59 [2022-01-18 14:24:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:56,324 INFO L470 AbstractCegarLoop]: Abstraction has 37449 states and 92953 transitions. [2022-01-18 14:24:56,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 37449 states and 92953 transitions. [2022-01-18 14:24:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:56,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:56,358 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:56,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 14:24:56,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-18 14:24:56,559 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1271430751, now seen corresponding path program 159 times [2022-01-18 14:24:56,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725382859] [2022-01-18 14:24:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:56,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:24:56,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:56,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725382859] [2022-01-18 14:24:56,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725382859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:56,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869277056] [2022-01-18 14:24:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:24:56,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:56,692 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:56,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 14:24:56,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 14:24:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:24:56,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:56,889 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:24:56,889 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 15 [2022-01-18 14:24:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:24:57,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869277056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:57,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:57,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:24:57,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480107669] [2022-01-18 14:24:57,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:57,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:24:57,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:24:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:24:57,031 INFO L87 Difference]: Start difference. First operand 37449 states and 92953 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:24:57,924 INFO L93 Difference]: Finished difference Result 39450 states and 97003 transitions. [2022-01-18 14:24:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:24:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:24:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:24:57,999 INFO L225 Difference]: With dead ends: 39450 [2022-01-18 14:24:57,999 INFO L226 Difference]: Without dead ends: 39414 [2022-01-18 14:24:57,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:24:57,999 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 142 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:24:57,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 526 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:24:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39414 states. [2022-01-18 14:24:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39414 to 37429. [2022-01-18 14:24:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37429 states, 37428 states have (on average 2.4822325531687506) internal successors, (92905), 37428 states have internal predecessors, (92905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37429 states to 37429 states and 92905 transitions. [2022-01-18 14:24:58,617 INFO L78 Accepts]: Start accepts. Automaton has 37429 states and 92905 transitions. Word has length 59 [2022-01-18 14:24:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:24:58,617 INFO L470 AbstractCegarLoop]: Abstraction has 37429 states and 92905 transitions. [2022-01-18 14:24:58,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:24:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37429 states and 92905 transitions. [2022-01-18 14:24:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:24:58,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:24:58,653 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:24:58,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 14:24:58,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-01-18 14:24:58,853 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:24:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:24:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 870486583, now seen corresponding path program 160 times [2022-01-18 14:24:58,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:24:58,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175380070] [2022-01-18 14:24:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:24:58,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:24:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:24:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:58,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:24:58,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175380070] [2022-01-18 14:24:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175380070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:24:58,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615712388] [2022-01-18 14:24:58,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:24:58,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:24:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:24:58,963 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:24:58,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 14:24:58,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:24:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:24:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:24:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:24:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:59,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:24:59,177 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:24:59,177 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 20 treesize of output 19 [2022-01-18 14:24:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:24:59,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615712388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:24:59,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:24:59,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:24:59,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328196995] [2022-01-18 14:24:59,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:24:59,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:24:59,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:24:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:24:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:24:59,316 INFO L87 Difference]: Start difference. First operand 37429 states and 92905 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:00,265 INFO L93 Difference]: Finished difference Result 41284 states and 100990 transitions. [2022-01-18 14:25:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:25:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:00,330 INFO L225 Difference]: With dead ends: 41284 [2022-01-18 14:25:00,330 INFO L226 Difference]: Without dead ends: 41272 [2022-01-18 14:25:00,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:25:00,330 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 157 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:00,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 640 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:25:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41272 states. [2022-01-18 14:25:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41272 to 37452. [2022-01-18 14:25:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37452 states, 37451 states have (on average 2.4823636217991507) internal successors, (92967), 37451 states have internal predecessors, (92967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37452 states to 37452 states and 92967 transitions. [2022-01-18 14:25:00,999 INFO L78 Accepts]: Start accepts. Automaton has 37452 states and 92967 transitions. Word has length 59 [2022-01-18 14:25:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:00,999 INFO L470 AbstractCegarLoop]: Abstraction has 37452 states and 92967 transitions. [2022-01-18 14:25:00,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 37452 states and 92967 transitions. [2022-01-18 14:25:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:01,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:01,037 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:01,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-01-18 14:25:01,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:01,237 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1611165279, now seen corresponding path program 85 times [2022-01-18 14:25:01,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:01,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083825130] [2022-01-18 14:25:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:01,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:01,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:01,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083825130] [2022-01-18 14:25:01,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083825130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:01,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340342963] [2022-01-18 14:25:01,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:01,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:01,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:01,344 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:01,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 14:25:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:01,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:01,638 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:01,638 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 15 [2022-01-18 14:25:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340342963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:01,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:01,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:25:01,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754195172] [2022-01-18 14:25:01,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:01,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:01,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:01,776 INFO L87 Difference]: Start difference. First operand 37452 states and 92967 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:02,421 INFO L93 Difference]: Finished difference Result 41025 states and 100386 transitions. [2022-01-18 14:25:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:02,495 INFO L225 Difference]: With dead ends: 41025 [2022-01-18 14:25:02,495 INFO L226 Difference]: Without dead ends: 40974 [2022-01-18 14:25:02,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:02,495 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 211 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:02,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 579 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:25:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40974 states. [2022-01-18 14:25:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40974 to 37636. [2022-01-18 14:25:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37636 states, 37635 states have (on average 2.4829015544041453) internal successors, (93444), 37635 states have internal predecessors, (93444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37636 states to 37636 states and 93444 transitions. [2022-01-18 14:25:03,409 INFO L78 Accepts]: Start accepts. Automaton has 37636 states and 93444 transitions. Word has length 59 [2022-01-18 14:25:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:03,409 INFO L470 AbstractCegarLoop]: Abstraction has 37636 states and 93444 transitions. [2022-01-18 14:25:03,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 37636 states and 93444 transitions. [2022-01-18 14:25:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:03,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:03,440 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:03,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 14:25:03,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 14:25:03,641 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash 511048123, now seen corresponding path program 161 times [2022-01-18 14:25:03,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:03,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473402001] [2022-01-18 14:25:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:03,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:03,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473402001] [2022-01-18 14:25:03,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473402001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529358914] [2022-01-18 14:25:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:25:03,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:03,777 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:03,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 14:25:03,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 14:25:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:03,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:03,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:03,986 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:03,987 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 15 [2022-01-18 14:25:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:04,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529358914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:04,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:04,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-01-18 14:25:04,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336818963] [2022-01-18 14:25:04,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:04,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:04,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:04,121 INFO L87 Difference]: Start difference. First operand 37636 states and 93444 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:04,855 INFO L93 Difference]: Finished difference Result 39105 states and 96192 transitions. [2022-01-18 14:25:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:04,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:04,923 INFO L225 Difference]: With dead ends: 39105 [2022-01-18 14:25:04,923 INFO L226 Difference]: Without dead ends: 39037 [2022-01-18 14:25:04,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:04,924 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 119 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:04,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 628 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39037 states. [2022-01-18 14:25:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39037 to 37606. [2022-01-18 14:25:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37606 states, 37605 states have (on average 2.481531711208616) internal successors, (93318), 37605 states have internal predecessors, (93318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37606 states to 37606 states and 93318 transitions. [2022-01-18 14:25:05,815 INFO L78 Accepts]: Start accepts. Automaton has 37606 states and 93318 transitions. Word has length 59 [2022-01-18 14:25:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:05,815 INFO L470 AbstractCegarLoop]: Abstraction has 37606 states and 93318 transitions. [2022-01-18 14:25:05,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 37606 states and 93318 transitions. [2022-01-18 14:25:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:05,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:05,850 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:05,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 14:25:06,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-18 14:25:06,050 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -102488057, now seen corresponding path program 162 times [2022-01-18 14:25:06,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:06,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055584376] [2022-01-18 14:25:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:06,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:06,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055584376] [2022-01-18 14:25:06,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055584376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945065244] [2022-01-18 14:25:06,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:25:06,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:06,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:06,173 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:06,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 14:25:06,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 14:25:06,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 14:25:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:06,512 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:25:06,512 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 16 [2022-01-18 14:25:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 54 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:25:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:06,637 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:06,637 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 15 [2022-01-18 14:25:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 45 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:06,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945065244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:06,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:06,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 27 [2022-01-18 14:25:06,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604055365] [2022-01-18 14:25:06,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:06,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:25:06,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:25:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:25:06,900 INFO L87 Difference]: Start difference. First operand 37606 states and 93318 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:10,411 INFO L93 Difference]: Finished difference Result 48879 states and 117701 transitions. [2022-01-18 14:25:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-18 14:25:10,412 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:10,667 INFO L225 Difference]: With dead ends: 48879 [2022-01-18 14:25:10,667 INFO L226 Difference]: Without dead ends: 48823 [2022-01-18 14:25:10,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 119 SyntacticMatches, 12 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7426 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2924, Invalid=15436, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 14:25:10,668 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1174 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 3241 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 4333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:10,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 1445 Invalid, 4333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3241 Invalid, 0 Unknown, 881 Unchecked, 1.2s Time] [2022-01-18 14:25:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48823 states. [2022-01-18 14:25:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48823 to 38574. [2022-01-18 14:25:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38574 states, 38573 states have (on average 2.4844321157286187) internal successors, (95832), 38573 states have internal predecessors, (95832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38574 states to 38574 states and 95832 transitions. [2022-01-18 14:25:11,400 INFO L78 Accepts]: Start accepts. Automaton has 38574 states and 95832 transitions. Word has length 59 [2022-01-18 14:25:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:11,401 INFO L470 AbstractCegarLoop]: Abstraction has 38574 states and 95832 transitions. [2022-01-18 14:25:11,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38574 states and 95832 transitions. [2022-01-18 14:25:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:11,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:11,437 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:11,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-18 14:25:11,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-01-18 14:25:11,638 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1750845560, now seen corresponding path program 163 times [2022-01-18 14:25:11,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064569745] [2022-01-18 14:25:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:11,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:11,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064569745] [2022-01-18 14:25:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064569745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833364724] [2022-01-18 14:25:11,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:11,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:11,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:11,734 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:11,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 14:25:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:25:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:12,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:12,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833364724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:12,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:12,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-01-18 14:25:12,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886360064] [2022-01-18 14:25:12,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:12,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:25:12,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:25:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:25:12,327 INFO L87 Difference]: Start difference. First operand 38574 states and 95832 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:12,791 INFO L93 Difference]: Finished difference Result 42318 states and 104215 transitions. [2022-01-18 14:25:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:25:12,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:12,863 INFO L225 Difference]: With dead ends: 42318 [2022-01-18 14:25:12,863 INFO L226 Difference]: Without dead ends: 42219 [2022-01-18 14:25:12,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:25:12,863 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 219 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:12,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 242 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:25:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42219 states. [2022-01-18 14:25:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42219 to 38847. [2022-01-18 14:25:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38847 states, 38846 states have (on average 2.4842454821603255) internal successors, (96503), 38846 states have internal predecessors, (96503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38847 states to 38847 states and 96503 transitions. [2022-01-18 14:25:13,786 INFO L78 Accepts]: Start accepts. Automaton has 38847 states and 96503 transitions. Word has length 59 [2022-01-18 14:25:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:13,786 INFO L470 AbstractCegarLoop]: Abstraction has 38847 states and 96503 transitions. [2022-01-18 14:25:13,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38847 states and 96503 transitions. [2022-01-18 14:25:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:13,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:13,822 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:13,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 14:25:14,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:14,022 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:14,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2039429277, now seen corresponding path program 164 times [2022-01-18 14:25:14,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273042367] [2022-01-18 14:25:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:14,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:14,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:14,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273042367] [2022-01-18 14:25:14,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273042367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:14,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055984700] [2022-01-18 14:25:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:25:14,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:14,133 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:14,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 14:25:14,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:25:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:14,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:14,344 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:14,344 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 20 treesize of output 19 [2022-01-18 14:25:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:14,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055984700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:14,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:14,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:25:14,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651642466] [2022-01-18 14:25:14,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:25:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:14,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:25:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:25:14,479 INFO L87 Difference]: Start difference. First operand 38847 states and 96503 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:15,214 INFO L93 Difference]: Finished difference Result 43192 states and 105721 transitions. [2022-01-18 14:25:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:25:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:15,283 INFO L225 Difference]: With dead ends: 43192 [2022-01-18 14:25:15,284 INFO L226 Difference]: Without dead ends: 43114 [2022-01-18 14:25:15,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:25:15,284 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 251 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:15,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 649 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43114 states. [2022-01-18 14:25:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43114 to 38137. [2022-01-18 14:25:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38137 states, 38136 states have (on average 2.4840046150618837) internal successors, (94730), 38136 states have internal predecessors, (94730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38137 states to 38137 states and 94730 transitions. [2022-01-18 14:25:16,147 INFO L78 Accepts]: Start accepts. Automaton has 38137 states and 94730 transitions. Word has length 59 [2022-01-18 14:25:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:16,147 INFO L470 AbstractCegarLoop]: Abstraction has 38137 states and 94730 transitions. [2022-01-18 14:25:16,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 38137 states and 94730 transitions. [2022-01-18 14:25:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:16,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:16,182 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:16,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:16,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:16,382 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2100701485, now seen corresponding path program 165 times [2022-01-18 14:25:16,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:16,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721077324] [2022-01-18 14:25:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:16,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:16,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:16,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721077324] [2022-01-18 14:25:16,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721077324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:16,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832457599] [2022-01-18 14:25:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:25:16,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:16,502 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:16,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 14:25:16,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-18 14:25:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:16,717 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:16,717 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 20 treesize of output 19 [2022-01-18 14:25:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:16,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832457599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:16,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:16,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:25:16,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379356971] [2022-01-18 14:25:16,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:16,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:25:16,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:25:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:25:16,843 INFO L87 Difference]: Start difference. First operand 38137 states and 94730 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:17,612 INFO L93 Difference]: Finished difference Result 43408 states and 106037 transitions. [2022-01-18 14:25:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:25:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:17,684 INFO L225 Difference]: With dead ends: 43408 [2022-01-18 14:25:17,685 INFO L226 Difference]: Without dead ends: 43348 [2022-01-18 14:25:17,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:25:17,685 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 214 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:17,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 656 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43348 states. [2022-01-18 14:25:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43348 to 38213. [2022-01-18 14:25:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38213 states, 38212 states have (on average 2.4835130325552184) internal successors, (94900), 38212 states have internal predecessors, (94900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38213 states to 38213 states and 94900 transitions. [2022-01-18 14:25:18,562 INFO L78 Accepts]: Start accepts. Automaton has 38213 states and 94900 transitions. Word has length 59 [2022-01-18 14:25:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:18,562 INFO L470 AbstractCegarLoop]: Abstraction has 38213 states and 94900 transitions. [2022-01-18 14:25:18,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38213 states and 94900 transitions. [2022-01-18 14:25:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:18,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:18,597 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:18,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 14:25:18,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:18,798 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:18,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1334323884, now seen corresponding path program 86 times [2022-01-18 14:25:18,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:18,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142432852] [2022-01-18 14:25:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:18,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:18,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142432852] [2022-01-18 14:25:18,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142432852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172596895] [2022-01-18 14:25:18,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:25:18,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:18,895 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:18,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 14:25:18,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:25:18,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:25:18,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:19,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172596895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:19,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:19,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-01-18 14:25:19,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804793025] [2022-01-18 14:25:19,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:19,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:25:19,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:25:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:25:19,345 INFO L87 Difference]: Start difference. First operand 38213 states and 94900 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:19,909 INFO L93 Difference]: Finished difference Result 57323 states and 140968 transitions. [2022-01-18 14:25:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:25:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:20,020 INFO L225 Difference]: With dead ends: 57323 [2022-01-18 14:25:20,020 INFO L226 Difference]: Without dead ends: 57323 [2022-01-18 14:25:20,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:25:20,021 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 457 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:20,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 201 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:25:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57323 states. [2022-01-18 14:25:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57323 to 43843. [2022-01-18 14:25:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43843 states, 43842 states have (on average 2.5257059440718947) internal successors, (110732), 43842 states have internal predecessors, (110732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43843 states to 43843 states and 110732 transitions. [2022-01-18 14:25:21,112 INFO L78 Accepts]: Start accepts. Automaton has 43843 states and 110732 transitions. Word has length 59 [2022-01-18 14:25:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:21,112 INFO L470 AbstractCegarLoop]: Abstraction has 43843 states and 110732 transitions. [2022-01-18 14:25:21,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 43843 states and 110732 transitions. [2022-01-18 14:25:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:21,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:21,153 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:21,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-18 14:25:21,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:21,354 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1993243736, now seen corresponding path program 87 times [2022-01-18 14:25:21,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:21,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449914431] [2022-01-18 14:25:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:21,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:21,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449914431] [2022-01-18 14:25:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449914431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751055747] [2022-01-18 14:25:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:25:21,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:21,467 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:21,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 14:25:21,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-18 14:25:21,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:25:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:21,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751055747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:22,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:22,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 18 [2022-01-18 14:25:22,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745345471] [2022-01-18 14:25:22,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:25:22,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:25:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:22,085 INFO L87 Difference]: Start difference. First operand 43843 states and 110732 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:22,666 INFO L93 Difference]: Finished difference Result 50679 states and 125358 transitions. [2022-01-18 14:25:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:25:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:22,758 INFO L225 Difference]: With dead ends: 50679 [2022-01-18 14:25:22,758 INFO L226 Difference]: Without dead ends: 50679 [2022-01-18 14:25:22,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:25:22,758 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 457 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:22,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 224 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:25:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50679 states. [2022-01-18 14:25:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50679 to 43132. [2022-01-18 14:25:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43132 states, 43131 states have (on average 2.5198117363381325) internal successors, (108682), 43131 states have internal predecessors, (108682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43132 states to 43132 states and 108682 transitions. [2022-01-18 14:25:23,748 INFO L78 Accepts]: Start accepts. Automaton has 43132 states and 108682 transitions. Word has length 59 [2022-01-18 14:25:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:23,748 INFO L470 AbstractCegarLoop]: Abstraction has 43132 states and 108682 transitions. [2022-01-18 14:25:23,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 43132 states and 108682 transitions. [2022-01-18 14:25:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:23,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:23,784 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:23,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-01-18 14:25:23,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:23,985 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1714098808, now seen corresponding path program 166 times [2022-01-18 14:25:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:23,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660754002] [2022-01-18 14:25:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:23,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:25:24,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660754002] [2022-01-18 14:25:24,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660754002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002685824] [2022-01-18 14:25:24,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:25:24,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:24,101 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:24,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 14:25:24,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:25:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:25:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002685824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:24,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:24,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-01-18 14:25:24,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392833497] [2022-01-18 14:25:24,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:24,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:25:24,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:25:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:25:24,556 INFO L87 Difference]: Start difference. First operand 43132 states and 108682 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:25,033 INFO L93 Difference]: Finished difference Result 45649 states and 113655 transitions. [2022-01-18 14:25:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:25:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:25,117 INFO L225 Difference]: With dead ends: 45649 [2022-01-18 14:25:25,118 INFO L226 Difference]: Without dead ends: 45562 [2022-01-18 14:25:25,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:25:25,118 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 238 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:25,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 202 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:25:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45562 states. [2022-01-18 14:25:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45562 to 42932. [2022-01-18 14:25:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42932 states, 42931 states have (on average 2.5179706971652185) internal successors, (108099), 42931 states have internal predecessors, (108099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42932 states to 42932 states and 108099 transitions. [2022-01-18 14:25:26,070 INFO L78 Accepts]: Start accepts. Automaton has 42932 states and 108099 transitions. Word has length 59 [2022-01-18 14:25:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:26,070 INFO L470 AbstractCegarLoop]: Abstraction has 42932 states and 108099 transitions. [2022-01-18 14:25:26,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 42932 states and 108099 transitions. [2022-01-18 14:25:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:26,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:26,108 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:26,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:26,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-01-18 14:25:26,308 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 46360567, now seen corresponding path program 167 times [2022-01-18 14:25:26,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458339174] [2022-01-18 14:25:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:26,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:25:26,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:26,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458339174] [2022-01-18 14:25:26,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458339174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:26,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627065955] [2022-01-18 14:25:26,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:25:26,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:26,437 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:26,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 14:25:26,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 14:25:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 156 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:25:26,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:26,708 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:26,708 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 20 treesize of output 19 [2022-01-18 14:25:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 156 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 14:25:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627065955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:26,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:26,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-18 14:25:26,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169143685] [2022-01-18 14:25:26,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:26,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:25:26,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:25:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:25:26,837 INFO L87 Difference]: Start difference. First operand 42932 states and 108099 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) [2022-01-18 14:25:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:27,151 INFO L93 Difference]: Finished difference Result 42955 states and 108138 transitions. [2022-01-18 14:25:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:25:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) Word has length 59 [2022-01-18 14:25:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:27,225 INFO L225 Difference]: With dead ends: 42955 [2022-01-18 14:25:27,226 INFO L226 Difference]: Without dead ends: 42932 [2022-01-18 14:25:27,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 14 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:25:27,226 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:27,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-18 14:25:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42932 states. [2022-01-18 14:25:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42932 to 42048. [2022-01-18 14:25:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42048 states, 42047 states have (on average 2.5279568102361645) internal successors, (106293), 42047 states have internal predecessors, (106293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42048 states to 42048 states and 106293 transitions. [2022-01-18 14:25:28,122 INFO L78 Accepts]: Start accepts. Automaton has 42048 states and 106293 transitions. Word has length 59 [2022-01-18 14:25:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:28,122 INFO L470 AbstractCegarLoop]: Abstraction has 42048 states and 106293 transitions. [2022-01-18 14:25:28,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) [2022-01-18 14:25:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 42048 states and 106293 transitions. [2022-01-18 14:25:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:28,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:28,158 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:28,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 14:25:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:28,359 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1234204293, now seen corresponding path program 88 times [2022-01-18 14:25:28,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:28,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196665254] [2022-01-18 14:25:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:28,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:28,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196665254] [2022-01-18 14:25:28,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196665254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718603447] [2022-01-18 14:25:28,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:25:28,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:28,471 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:28,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 14:25:28,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:25:28,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:28,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:28,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:28,666 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:28,667 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 15 [2022-01-18 14:25:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:28,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718603447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:28,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:28,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:25:28,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794508412] [2022-01-18 14:25:28,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:28,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:28,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:28,802 INFO L87 Difference]: Start difference. First operand 42048 states and 106293 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:29,697 INFO L93 Difference]: Finished difference Result 45632 states and 113805 transitions. [2022-01-18 14:25:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:29,767 INFO L225 Difference]: With dead ends: 45632 [2022-01-18 14:25:29,768 INFO L226 Difference]: Without dead ends: 45589 [2022-01-18 14:25:29,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:29,768 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 214 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:29,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 508 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:25:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45589 states. [2022-01-18 14:25:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45589 to 42095. [2022-01-18 14:25:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42095 states, 42094 states have (on average 2.5284838694350737) internal successors, (106434), 42094 states have internal predecessors, (106434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42095 states to 42095 states and 106434 transitions. [2022-01-18 14:25:30,518 INFO L78 Accepts]: Start accepts. Automaton has 42095 states and 106434 transitions. Word has length 59 [2022-01-18 14:25:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:30,518 INFO L470 AbstractCegarLoop]: Abstraction has 42095 states and 106434 transitions. [2022-01-18 14:25:30,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 42095 states and 106434 transitions. [2022-01-18 14:25:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:30,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:30,553 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:30,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-01-18 14:25:30,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 14:25:30,754 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash 888009109, now seen corresponding path program 168 times [2022-01-18 14:25:30,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366998143] [2022-01-18 14:25:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:30,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:31,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366998143] [2022-01-18 14:25:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366998143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473167604] [2022-01-18 14:25:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:25:31,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:31,100 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:31,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 14:25:31,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-18 14:25:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:31,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:31,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:31,302 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:31,302 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 15 [2022-01-18 14:25:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:31,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473167604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:31,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:31,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-01-18 14:25:31,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384755933] [2022-01-18 14:25:31,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:31,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:31,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:31,437 INFO L87 Difference]: Start difference. First operand 42095 states and 106434 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:32,141 INFO L93 Difference]: Finished difference Result 43452 states and 109014 transitions. [2022-01-18 14:25:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:32,220 INFO L225 Difference]: With dead ends: 43452 [2022-01-18 14:25:32,221 INFO L226 Difference]: Without dead ends: 43366 [2022-01-18 14:25:32,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:32,221 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 131 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:32,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 538 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43366 states. [2022-01-18 14:25:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43366 to 42032. [2022-01-18 14:25:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42032 states, 42031 states have (on average 2.5273964454807167) internal successors, (106229), 42031 states have internal predecessors, (106229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42032 states to 42032 states and 106229 transitions. [2022-01-18 14:25:33,203 INFO L78 Accepts]: Start accepts. Automaton has 42032 states and 106229 transitions. Word has length 59 [2022-01-18 14:25:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:33,203 INFO L470 AbstractCegarLoop]: Abstraction has 42032 states and 106229 transitions. [2022-01-18 14:25:33,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 42032 states and 106229 transitions. [2022-01-18 14:25:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:33,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:33,240 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:33,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-01-18 14:25:33,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 14:25:33,441 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 274472929, now seen corresponding path program 169 times [2022-01-18 14:25:33,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557131682] [2022-01-18 14:25:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:33,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:33,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:33,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557131682] [2022-01-18 14:25:33,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557131682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:33,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081267868] [2022-01-18 14:25:33,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:33,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:33,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:33,547 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:33,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 14:25:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:33,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:33,739 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:33,739 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 15 [2022-01-18 14:25:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081267868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:33,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:33,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:25:33,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195522615] [2022-01-18 14:25:33,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:33,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:33,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:33,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:33,875 INFO L87 Difference]: Start difference. First operand 42032 states and 106229 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:34,503 INFO L93 Difference]: Finished difference Result 44610 states and 111534 transitions. [2022-01-18 14:25:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:34,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:34,585 INFO L225 Difference]: With dead ends: 44610 [2022-01-18 14:25:34,585 INFO L226 Difference]: Without dead ends: 44550 [2022-01-18 14:25:34,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:34,585 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 170 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:34,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 563 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:25:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44550 states. [2022-01-18 14:25:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44550 to 41795. [2022-01-18 14:25:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41795 states, 41794 states have (on average 2.527874814566684) internal successors, (105650), 41794 states have internal predecessors, (105650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41795 states to 41795 states and 105650 transitions. [2022-01-18 14:25:35,489 INFO L78 Accepts]: Start accepts. Automaton has 41795 states and 105650 transitions. Word has length 59 [2022-01-18 14:25:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:35,489 INFO L470 AbstractCegarLoop]: Abstraction has 41795 states and 105650 transitions. [2022-01-18 14:25:35,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41795 states and 105650 transitions. [2022-01-18 14:25:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:35,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:35,529 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:35,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-01-18 14:25:35,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-01-18 14:25:35,729 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:35,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1878577033, now seen corresponding path program 170 times [2022-01-18 14:25:35,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101648614] [2022-01-18 14:25:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:35,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:35,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:35,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101648614] [2022-01-18 14:25:35,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101648614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:35,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970674281] [2022-01-18 14:25:35,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:25:35,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:35,839 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:35,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 14:25:35,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:25:35,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:35,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:36,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:36,054 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:36,054 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 20 treesize of output 19 [2022-01-18 14:25:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:36,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970674281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:36,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:36,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:25:36,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941921361] [2022-01-18 14:25:36,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:36,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:25:36,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:25:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:25:36,191 INFO L87 Difference]: Start difference. First operand 41795 states and 105650 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:37,000 INFO L93 Difference]: Finished difference Result 46661 states and 116107 transitions. [2022-01-18 14:25:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:25:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:37,088 INFO L225 Difference]: With dead ends: 46661 [2022-01-18 14:25:37,088 INFO L226 Difference]: Without dead ends: 46607 [2022-01-18 14:25:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:25:37,089 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 291 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:37,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 695 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46607 states. [2022-01-18 14:25:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46607 to 41852. [2022-01-18 14:25:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41852 states, 41851 states have (on average 2.5281833170055674) internal successors, (105807), 41851 states have internal predecessors, (105807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41852 states to 41852 states and 105807 transitions. [2022-01-18 14:25:38,067 INFO L78 Accepts]: Start accepts. Automaton has 41852 states and 105807 transitions. Word has length 59 [2022-01-18 14:25:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:38,067 INFO L470 AbstractCegarLoop]: Abstraction has 41852 states and 105807 transitions. [2022-01-18 14:25:38,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41852 states and 105807 transitions. [2022-01-18 14:25:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:38,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:38,105 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:38,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 14:25:38,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-01-18 14:25:38,305 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1723740499, now seen corresponding path program 171 times [2022-01-18 14:25:38,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:38,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596331922] [2022-01-18 14:25:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:38,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:38,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596331922] [2022-01-18 14:25:38,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596331922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236904344] [2022-01-18 14:25:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:25:38,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:38,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:38,421 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:38,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 14:25:38,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-01-18 14:25:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:38,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:38,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:38,636 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:38,636 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 20 treesize of output 19 [2022-01-18 14:25:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236904344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:38,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:38,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:25:38,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122590142] [2022-01-18 14:25:38,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:38,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:25:38,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:25:38,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:25:38,762 INFO L87 Difference]: Start difference. First operand 41852 states and 105807 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:39,893 INFO L93 Difference]: Finished difference Result 49896 states and 123498 transitions. [2022-01-18 14:25:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 14:25:39,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:39,986 INFO L225 Difference]: With dead ends: 49896 [2022-01-18 14:25:39,986 INFO L226 Difference]: Without dead ends: 49782 [2022-01-18 14:25:39,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:25:39,986 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 463 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:39,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 751 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:25:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49782 states. [2022-01-18 14:25:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49782 to 42060. [2022-01-18 14:25:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42060 states, 42059 states have (on average 2.529042535485865) internal successors, (106369), 42059 states have internal predecessors, (106369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42060 states to 42060 states and 106369 transitions. [2022-01-18 14:25:41,081 INFO L78 Accepts]: Start accepts. Automaton has 42060 states and 106369 transitions. Word has length 59 [2022-01-18 14:25:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:41,081 INFO L470 AbstractCegarLoop]: Abstraction has 42060 states and 106369 transitions. [2022-01-18 14:25:41,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 42060 states and 106369 transitions. [2022-01-18 14:25:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:41,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:41,117 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:41,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:41,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:41,318 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1783432009, now seen corresponding path program 172 times [2022-01-18 14:25:41,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:41,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229481597] [2022-01-18 14:25:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:41,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:41,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229481597] [2022-01-18 14:25:41,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229481597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155508634] [2022-01-18 14:25:41,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:25:41,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:41,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:41,475 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:41,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 14:25:41,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:25:41,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:41,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:41,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:41,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:41,693 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:41,693 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 20 treesize of output 19 [2022-01-18 14:25:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:25:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155508634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:41,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:41,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:25:41,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496664947] [2022-01-18 14:25:41,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:41,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:25:41,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:25:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:25:41,812 INFO L87 Difference]: Start difference. First operand 42060 states and 106369 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:42,706 INFO L93 Difference]: Finished difference Result 49444 states and 122674 transitions. [2022-01-18 14:25:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:25:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:42,798 INFO L225 Difference]: With dead ends: 49444 [2022-01-18 14:25:42,798 INFO L226 Difference]: Without dead ends: 49288 [2022-01-18 14:25:42,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:25:42,798 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 287 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:42,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 723 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:25:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49288 states. [2022-01-18 14:25:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49288 to 41805. [2022-01-18 14:25:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41805 states, 41804 states have (on average 2.527485408094919) internal successors, (105659), 41804 states have internal predecessors, (105659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41805 states to 41805 states and 105659 transitions. [2022-01-18 14:25:43,772 INFO L78 Accepts]: Start accepts. Automaton has 41805 states and 105659 transitions. Word has length 59 [2022-01-18 14:25:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:43,772 INFO L470 AbstractCegarLoop]: Abstraction has 41805 states and 105659 transitions. [2022-01-18 14:25:43,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41805 states and 105659 transitions. [2022-01-18 14:25:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:43,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:43,809 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:43,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-18 14:25:44,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:44,009 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:44,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:44,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1766017889, now seen corresponding path program 89 times [2022-01-18 14:25:44,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:44,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458675413] [2022-01-18 14:25:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:44,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:44,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458675413] [2022-01-18 14:25:44,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458675413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849983149] [2022-01-18 14:25:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:25:44,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:44,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:44,120 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:44,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 14:25:44,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-18 14:25:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:44,322 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:44,323 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 15 [2022-01-18 14:25:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849983149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:44,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:25:44,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451740494] [2022-01-18 14:25:44,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:44,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:44,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:44,458 INFO L87 Difference]: Start difference. First operand 41805 states and 105659 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:45,089 INFO L93 Difference]: Finished difference Result 44814 states and 111983 transitions. [2022-01-18 14:25:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:45,172 INFO L225 Difference]: With dead ends: 44814 [2022-01-18 14:25:45,172 INFO L226 Difference]: Without dead ends: 44779 [2022-01-18 14:25:45,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:45,173 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 197 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:45,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 524 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:25:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44779 states. [2022-01-18 14:25:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44779 to 41795. [2022-01-18 14:25:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41795 states, 41794 states have (on average 2.527779107048859) internal successors, (105646), 41794 states have internal predecessors, (105646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41795 states to 41795 states and 105646 transitions. [2022-01-18 14:25:46,089 INFO L78 Accepts]: Start accepts. Automaton has 41795 states and 105646 transitions. Word has length 59 [2022-01-18 14:25:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 41795 states and 105646 transitions. [2022-01-18 14:25:46,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 41795 states and 105646 transitions. [2022-01-18 14:25:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:46,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:46,124 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:46,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-01-18 14:25:46,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:46,325 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash -406736005, now seen corresponding path program 173 times [2022-01-18 14:25:46,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:46,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361880794] [2022-01-18 14:25:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:46,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:46,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361880794] [2022-01-18 14:25:46,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361880794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204350567] [2022-01-18 14:25:46,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:25:46,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:46,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:46,429 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:46,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 14:25:46,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-18 14:25:46,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:46,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:46,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:46,639 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:46,639 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 15 [2022-01-18 14:25:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:46,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204350567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:46,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:46,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-01-18 14:25:46,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065573003] [2022-01-18 14:25:46,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:46,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:46,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:46,776 INFO L87 Difference]: Start difference. First operand 41795 states and 105646 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:47,779 INFO L93 Difference]: Finished difference Result 43133 states and 108191 transitions. [2022-01-18 14:25:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:47,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:47,868 INFO L225 Difference]: With dead ends: 43133 [2022-01-18 14:25:47,869 INFO L226 Difference]: Without dead ends: 43039 [2022-01-18 14:25:47,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:47,869 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 135 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:47,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 550 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43039 states. [2022-01-18 14:25:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43039 to 41690. [2022-01-18 14:25:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41690 states, 41689 states have (on average 2.5267096836095853) internal successors, (105336), 41689 states have internal predecessors, (105336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41690 states to 41690 states and 105336 transitions. [2022-01-18 14:25:48,575 INFO L78 Accepts]: Start accepts. Automaton has 41690 states and 105336 transitions. Word has length 59 [2022-01-18 14:25:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:48,575 INFO L470 AbstractCegarLoop]: Abstraction has 41690 states and 105336 transitions. [2022-01-18 14:25:48,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 41690 states and 105336 transitions. [2022-01-18 14:25:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:48,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:48,611 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:48,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 14:25:48,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2022-01-18 14:25:48,811 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1020272185, now seen corresponding path program 174 times [2022-01-18 14:25:48,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:48,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221601522] [2022-01-18 14:25:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:48,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:48,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:48,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221601522] [2022-01-18 14:25:48,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221601522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859986730] [2022-01-18 14:25:48,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:25:48,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:48,924 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:48,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 14:25:48,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-18 14:25:48,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:49,122 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:25:49,122 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 15 [2022-01-18 14:25:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:25:49,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859986730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:49,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:49,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:25:49,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280124685] [2022-01-18 14:25:49,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:25:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:25:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:25:49,477 INFO L87 Difference]: Start difference. First operand 41690 states and 105336 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:50,112 INFO L93 Difference]: Finished difference Result 44219 states and 110558 transitions. [2022-01-18 14:25:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:25:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:50,204 INFO L225 Difference]: With dead ends: 44219 [2022-01-18 14:25:50,205 INFO L226 Difference]: Without dead ends: 44165 [2022-01-18 14:25:50,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:25:50,205 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 182 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:50,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 587 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:25:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44165 states. [2022-01-18 14:25:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44165 to 41616. [2022-01-18 14:25:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41616 states, 41615 states have (on average 2.5268052384957347) internal successors, (105153), 41615 states have internal predecessors, (105153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41616 states to 41616 states and 105153 transitions. [2022-01-18 14:25:51,229 INFO L78 Accepts]: Start accepts. Automaton has 41616 states and 105153 transitions. Word has length 59 [2022-01-18 14:25:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:51,229 INFO L470 AbstractCegarLoop]: Abstraction has 41616 states and 105153 transitions. [2022-01-18 14:25:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 41616 states and 105153 transitions. [2022-01-18 14:25:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:51,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:51,265 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:51,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-01-18 14:25:51,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:51,465 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1121645149, now seen corresponding path program 175 times [2022-01-18 14:25:51,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671702197] [2022-01-18 14:25:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:51,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:51,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671702197] [2022-01-18 14:25:51,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671702197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820347925] [2022-01-18 14:25:51,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:25:51,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:51,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:51,604 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:51,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 14:25:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:51,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:51,864 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:51,864 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 20 treesize of output 19 [2022-01-18 14:25:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:51,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820347925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:51,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:51,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:25:51,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132142924] [2022-01-18 14:25:51,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:51,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:25:51,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:25:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:25:51,999 INFO L87 Difference]: Start difference. First operand 41616 states and 105153 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:52,819 INFO L93 Difference]: Finished difference Result 46313 states and 115153 transitions. [2022-01-18 14:25:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:25:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:52,898 INFO L225 Difference]: With dead ends: 46313 [2022-01-18 14:25:52,898 INFO L226 Difference]: Without dead ends: 46259 [2022-01-18 14:25:52,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:25:52,899 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 311 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:52,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 733 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:25:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46259 states. [2022-01-18 14:25:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46259 to 41634. [2022-01-18 14:25:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41634 states, 41633 states have (on average 2.5269377657146976) internal successors, (105204), 41633 states have internal predecessors, (105204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41634 states to 41634 states and 105204 transitions. [2022-01-18 14:25:53,853 INFO L78 Accepts]: Start accepts. Automaton has 41634 states and 105204 transitions. Word has length 59 [2022-01-18 14:25:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:53,853 INFO L470 AbstractCegarLoop]: Abstraction has 41634 states and 105204 transitions. [2022-01-18 14:25:53,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41634 states and 105204 transitions. [2022-01-18 14:25:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:53,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:53,888 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:53,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-18 14:25:54,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:54,089 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1276481683, now seen corresponding path program 176 times [2022-01-18 14:25:54,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:54,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698136309] [2022-01-18 14:25:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:54,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:54,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:54,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698136309] [2022-01-18 14:25:54,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698136309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:54,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707643618] [2022-01-18 14:25:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:25:54,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:54,206 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:54,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 14:25:54,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:25:54,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:54,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:54,427 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:54,427 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 20 treesize of output 19 [2022-01-18 14:25:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:54,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707643618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:54,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:54,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:25:54,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862063291] [2022-01-18 14:25:54,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:54,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:25:54,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:25:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:25:54,552 INFO L87 Difference]: Start difference. First operand 41634 states and 105204 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:55,668 INFO L93 Difference]: Finished difference Result 50367 states and 124278 transitions. [2022-01-18 14:25:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 14:25:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:55,762 INFO L225 Difference]: With dead ends: 50367 [2022-01-18 14:25:55,762 INFO L226 Difference]: Without dead ends: 50187 [2022-01-18 14:25:55,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 14:25:55,762 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 544 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:55,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 912 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:25:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50187 states. [2022-01-18 14:25:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50187 to 41780. [2022-01-18 14:25:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41780 states, 41779 states have (on average 2.527729241963666) internal successors, (105606), 41779 states have internal predecessors, (105606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41780 states to 41780 states and 105606 transitions. [2022-01-18 14:25:56,751 INFO L78 Accepts]: Start accepts. Automaton has 41780 states and 105606 transitions. Word has length 59 [2022-01-18 14:25:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:25:56,751 INFO L470 AbstractCegarLoop]: Abstraction has 41780 states and 105606 transitions. [2022-01-18 14:25:56,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41780 states and 105606 transitions. [2022-01-18 14:25:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:25:56,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:25:56,787 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:25:56,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-18 14:25:56,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 14:25:56,988 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:25:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:25:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1216790173, now seen corresponding path program 177 times [2022-01-18 14:25:56,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:25:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351107841] [2022-01-18 14:25:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:25:56,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:25:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:25:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:57,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:25:57,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351107841] [2022-01-18 14:25:57,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351107841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:25:57,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673352809] [2022-01-18 14:25:57,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:25:57,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:25:57,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:25:57,120 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:25:57,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 14:25:57,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-18 14:25:57,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:25:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:25:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:25:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:25:57,331 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:25:57,332 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 20 treesize of output 19 [2022-01-18 14:25:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:25:57,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673352809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:25:57,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:25:57,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:25:57,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510025551] [2022-01-18 14:25:57,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:25:57,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:25:57,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:25:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:25:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:25:57,444 INFO L87 Difference]: Start difference. First operand 41780 states and 105606 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:25:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:25:59,024 INFO L93 Difference]: Finished difference Result 56614 states and 138763 transitions. [2022-01-18 14:25:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 14:25:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:25:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:25:59,128 INFO L225 Difference]: With dead ends: 56614 [2022-01-18 14:25:59,129 INFO L226 Difference]: Without dead ends: 56338 [2022-01-18 14:25:59,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 14:25:59,129 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 867 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:25:59,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 870 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:25:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56338 states. [2022-01-18 14:26:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56338 to 42195. [2022-01-18 14:26:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42195 states, 42194 states have (on average 2.529151064132341) internal successors, (106715), 42194 states have internal predecessors, (106715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42195 states to 42195 states and 106715 transitions. [2022-01-18 14:26:00,158 INFO L78 Accepts]: Start accepts. Automaton has 42195 states and 106715 transitions. Word has length 59 [2022-01-18 14:26:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:00,158 INFO L470 AbstractCegarLoop]: Abstraction has 42195 states and 106715 transitions. [2022-01-18 14:26:00,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42195 states and 106715 transitions. [2022-01-18 14:26:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:00,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:00,195 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:00,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-18 14:26:00,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-18 14:26:00,395 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:00,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1063476307, now seen corresponding path program 178 times [2022-01-18 14:26:00,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:00,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975232632] [2022-01-18 14:26:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:00,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:00,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975232632] [2022-01-18 14:26:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975232632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19282509] [2022-01-18 14:26:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:26:00,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:00,533 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:00,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 14:26:00,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:26:00,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:00,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:00,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:00,746 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:00,746 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 20 treesize of output 19 [2022-01-18 14:26:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:00,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19282509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:00,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:00,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-01-18 14:26:00,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162979893] [2022-01-18 14:26:00,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:00,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:26:00,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:26:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:26:00,854 INFO L87 Difference]: Start difference. First operand 42195 states and 106715 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:01,748 INFO L93 Difference]: Finished difference Result 48550 states and 120599 transitions. [2022-01-18 14:26:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:26:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:01,828 INFO L225 Difference]: With dead ends: 48550 [2022-01-18 14:26:01,829 INFO L226 Difference]: Without dead ends: 48172 [2022-01-18 14:26:01,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:26:01,829 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 365 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:01,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 702 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:26:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48172 states. [2022-01-18 14:26:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48172 to 41369. [2022-01-18 14:26:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41369 states, 41368 states have (on average 2.525285244633533) internal successors, (104466), 41368 states have internal predecessors, (104466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41369 states to 41369 states and 104466 transitions. [2022-01-18 14:26:02,799 INFO L78 Accepts]: Start accepts. Automaton has 41369 states and 104466 transitions. Word has length 59 [2022-01-18 14:26:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:02,799 INFO L470 AbstractCegarLoop]: Abstraction has 41369 states and 104466 transitions. [2022-01-18 14:26:02,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 41369 states and 104466 transitions. [2022-01-18 14:26:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:02,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:02,834 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:02,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-18 14:26:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 14:26:03,035 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1179355205, now seen corresponding path program 90 times [2022-01-18 14:26:03,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:03,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694945087] [2022-01-18 14:26:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:03,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:03,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:03,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694945087] [2022-01-18 14:26:03,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694945087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:03,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321760342] [2022-01-18 14:26:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:26:03,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:03,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:03,149 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:03,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 14:26:03,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-01-18 14:26:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:03,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:03,365 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:26:03,365 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 15 [2022-01-18 14:26:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:03,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321760342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:03,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:03,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:26:03,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037308325] [2022-01-18 14:26:03,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:03,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:26:03,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:26:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:26:03,511 INFO L87 Difference]: Start difference. First operand 41369 states and 104466 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:04,140 INFO L93 Difference]: Finished difference Result 44137 states and 110325 transitions. [2022-01-18 14:26:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:26:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:04,217 INFO L225 Difference]: With dead ends: 44137 [2022-01-18 14:26:04,217 INFO L226 Difference]: Without dead ends: 44108 [2022-01-18 14:26:04,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:26:04,217 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:04,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 524 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:26:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44108 states. [2022-01-18 14:26:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44108 to 41116. [2022-01-18 14:26:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41116 states, 41115 states have (on average 2.5248935911467836) internal successors, (103811), 41115 states have internal predecessors, (103811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41116 states to 41116 states and 103811 transitions. [2022-01-18 14:26:05,217 INFO L78 Accepts]: Start accepts. Automaton has 41116 states and 103811 transitions. Word has length 59 [2022-01-18 14:26:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:05,217 INFO L470 AbstractCegarLoop]: Abstraction has 41116 states and 103811 transitions. [2022-01-18 14:26:05,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 41116 states and 103811 transitions. [2022-01-18 14:26:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:05,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:05,253 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:05,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-18 14:26:05,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:05,454 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash 942858197, now seen corresponding path program 179 times [2022-01-18 14:26:05,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:05,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796465347] [2022-01-18 14:26:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:05,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:05,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796465347] [2022-01-18 14:26:05,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796465347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:05,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435479052] [2022-01-18 14:26:05,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:26:05,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:05,559 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:05,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 14:26:05,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-01-18 14:26:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:05,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:05,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:05,788 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:26:05,788 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 15 [2022-01-18 14:26:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:05,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435479052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:05,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:05,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-01-18 14:26:05,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58875720] [2022-01-18 14:26:05,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:05,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:26:05,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:26:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:26:05,924 INFO L87 Difference]: Start difference. First operand 41116 states and 103811 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:06,902 INFO L93 Difference]: Finished difference Result 42492 states and 106439 transitions. [2022-01-18 14:26:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:26:06,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:06,978 INFO L225 Difference]: With dead ends: 42492 [2022-01-18 14:26:06,978 INFO L226 Difference]: Without dead ends: 42380 [2022-01-18 14:26:06,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:26:06,978 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 139 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:06,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 558 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:26:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42380 states. [2022-01-18 14:26:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42380 to 40866. [2022-01-18 14:26:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40866 states, 40865 states have (on average 2.523993637587177) internal successors, (103143), 40865 states have internal predecessors, (103143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40866 states to 40866 states and 103143 transitions. [2022-01-18 14:26:07,689 INFO L78 Accepts]: Start accepts. Automaton has 40866 states and 103143 transitions. Word has length 59 [2022-01-18 14:26:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:07,689 INFO L470 AbstractCegarLoop]: Abstraction has 40866 states and 103143 transitions. [2022-01-18 14:26:07,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40866 states and 103143 transitions. [2022-01-18 14:26:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:07,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:07,945 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:07,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 14:26:08,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:08,146 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash 329322017, now seen corresponding path program 180 times [2022-01-18 14:26:08,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:08,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162269896] [2022-01-18 14:26:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:08,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:08,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162269896] [2022-01-18 14:26:08,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162269896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721006086] [2022-01-18 14:26:08,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:26:08,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:08,257 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:08,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 14:26:08,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-01-18 14:26:08,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:08,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:08,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:08,451 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:26:08,451 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 15 [2022-01-18 14:26:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721006086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:08,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:08,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:26:08,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189574202] [2022-01-18 14:26:08,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:08,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:26:08,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:26:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:26:08,588 INFO L87 Difference]: Start difference. First operand 40866 states and 103143 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:09,215 INFO L93 Difference]: Finished difference Result 43428 states and 108465 transitions. [2022-01-18 14:26:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:26:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:09,287 INFO L225 Difference]: With dead ends: 43428 [2022-01-18 14:26:09,287 INFO L226 Difference]: Without dead ends: 43365 [2022-01-18 14:26:09,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:26:09,287 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 181 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:09,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 613 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:26:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43365 states. [2022-01-18 14:26:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43365 to 40854. [2022-01-18 14:26:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40854 states, 40853 states have (on average 2.5238782953516266) internal successors, (103108), 40853 states have internal predecessors, (103108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40854 states to 40854 states and 103108 transitions. [2022-01-18 14:26:10,207 INFO L78 Accepts]: Start accepts. Automaton has 40854 states and 103108 transitions. Word has length 59 [2022-01-18 14:26:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:10,207 INFO L470 AbstractCegarLoop]: Abstraction has 40854 states and 103108 transitions. [2022-01-18 14:26:10,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 40854 states and 103108 transitions. [2022-01-18 14:26:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:10,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:10,244 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:10,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-18 14:26:10,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-01-18 14:26:10,444 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1823727945, now seen corresponding path program 181 times [2022-01-18 14:26:10,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862671437] [2022-01-18 14:26:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:10,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:10,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862671437] [2022-01-18 14:26:10,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862671437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27066857] [2022-01-18 14:26:10,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:26:10,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:10,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:10,554 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:10,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 14:26:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:10,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:10,762 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:10,763 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 20 treesize of output 19 [2022-01-18 14:26:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27066857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:10,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:10,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:26:10,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289331785] [2022-01-18 14:26:10,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:26:10,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:26:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:26:10,899 INFO L87 Difference]: Start difference. First operand 40854 states and 103108 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:11,810 INFO L93 Difference]: Finished difference Result 47264 states and 117077 transitions. [2022-01-18 14:26:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:26:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:11,892 INFO L225 Difference]: With dead ends: 47264 [2022-01-18 14:26:11,892 INFO L226 Difference]: Without dead ends: 47132 [2022-01-18 14:26:11,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:26:11,892 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 325 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:11,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 871 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:26:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47132 states. [2022-01-18 14:26:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47132 to 40702. [2022-01-18 14:26:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40702 states, 40701 states have (on average 2.52337780398516) internal successors, (102704), 40701 states have internal predecessors, (102704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40702 states to 40702 states and 102704 transitions. [2022-01-18 14:26:12,810 INFO L78 Accepts]: Start accepts. Automaton has 40702 states and 102704 transitions. Word has length 59 [2022-01-18 14:26:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:12,810 INFO L470 AbstractCegarLoop]: Abstraction has 40702 states and 102704 transitions. [2022-01-18 14:26:12,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 40702 states and 102704 transitions. [2022-01-18 14:26:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:12,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:12,843 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:12,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-18 14:26:13,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-01-18 14:26:13,044 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1668891411, now seen corresponding path program 182 times [2022-01-18 14:26:13,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:13,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374314114] [2022-01-18 14:26:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:13,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:13,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:13,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374314114] [2022-01-18 14:26:13,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374314114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:13,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252419593] [2022-01-18 14:26:13,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:26:13,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:13,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:13,160 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:13,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 14:26:13,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:26:13,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:13,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:13,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:13,367 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:13,367 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 20 treesize of output 19 [2022-01-18 14:26:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:13,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252419593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:13,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:13,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:26:13,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385758226] [2022-01-18 14:26:13,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:26:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:26:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:26:13,490 INFO L87 Difference]: Start difference. First operand 40702 states and 102704 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:14,718 INFO L93 Difference]: Finished difference Result 55518 states and 136913 transitions. [2022-01-18 14:26:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 14:26:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:14,820 INFO L225 Difference]: With dead ends: 55518 [2022-01-18 14:26:14,820 INFO L226 Difference]: Without dead ends: 55338 [2022-01-18 14:26:14,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 14:26:14,820 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 627 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:14,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 1000 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:26:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55338 states. [2022-01-18 14:26:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55338 to 41637. [2022-01-18 14:26:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41637 states, 41636 states have (on average 2.52752425785378) internal successors, (105236), 41636 states have internal predecessors, (105236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41637 states to 41637 states and 105236 transitions. [2022-01-18 14:26:15,838 INFO L78 Accepts]: Start accepts. Automaton has 41637 states and 105236 transitions. Word has length 59 [2022-01-18 14:26:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:15,839 INFO L470 AbstractCegarLoop]: Abstraction has 41637 states and 105236 transitions. [2022-01-18 14:26:15,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 41637 states and 105236 transitions. [2022-01-18 14:26:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:15,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:15,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:15,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:16,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2022-01-18 14:26:16,074 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1728582921, now seen corresponding path program 183 times [2022-01-18 14:26:16,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:16,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864925745] [2022-01-18 14:26:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:16,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:16,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864925745] [2022-01-18 14:26:16,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864925745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169457627] [2022-01-18 14:26:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:26:16,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:16,196 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:16,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 14:26:16,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-01-18 14:26:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:16,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:16,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:16,559 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:16,559 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 20 treesize of output 19 [2022-01-18 14:26:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169457627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:16,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:26:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095016214] [2022-01-18 14:26:16,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:16,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:26:16,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:26:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:26:16,675 INFO L87 Difference]: Start difference. First operand 41637 states and 105236 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:18,395 INFO L93 Difference]: Finished difference Result 75986 states and 186088 transitions. [2022-01-18 14:26:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 14:26:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:18,543 INFO L225 Difference]: With dead ends: 75986 [2022-01-18 14:26:18,543 INFO L226 Difference]: Without dead ends: 75464 [2022-01-18 14:26:18,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 14:26:18,544 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1266 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:18,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 1023 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:26:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75464 states. [2022-01-18 14:26:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75464 to 44477. [2022-01-18 14:26:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44477 states, 44476 states have (on average 2.5335012141379623) internal successors, (112680), 44476 states have internal predecessors, (112680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44477 states to 44477 states and 112680 transitions. [2022-01-18 14:26:19,711 INFO L78 Accepts]: Start accepts. Automaton has 44477 states and 112680 transitions. Word has length 59 [2022-01-18 14:26:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:19,711 INFO L470 AbstractCegarLoop]: Abstraction has 44477 states and 112680 transitions. [2022-01-18 14:26:19,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 44477 states and 112680 transitions. [2022-01-18 14:26:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:19,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:19,745 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:19,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:19,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:19,945 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1881896787, now seen corresponding path program 184 times [2022-01-18 14:26:19,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:19,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904366887] [2022-01-18 14:26:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:19,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:20,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:20,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904366887] [2022-01-18 14:26:20,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904366887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:20,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625226467] [2022-01-18 14:26:20,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:26:20,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:20,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:20,081 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:20,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 14:26:20,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:26:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:20,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:20,292 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:20,292 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 20 treesize of output 19 [2022-01-18 14:26:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625226467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:20,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:20,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-01-18 14:26:20,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041152546] [2022-01-18 14:26:20,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:20,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:26:20,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:20,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:26:20,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:26:20,401 INFO L87 Difference]: Start difference. First operand 44477 states and 112680 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:22,985 INFO L93 Difference]: Finished difference Result 94431 states and 228738 transitions. [2022-01-18 14:26:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 14:26:22,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:23,165 INFO L225 Difference]: With dead ends: 94431 [2022-01-18 14:26:23,165 INFO L226 Difference]: Without dead ends: 92496 [2022-01-18 14:26:23,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6680 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 14:26:23,167 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1832 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 972 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:26:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92496 states. [2022-01-18 14:26:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92496 to 44418. [2022-01-18 14:26:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44418 states, 44417 states have (on average 2.5277708985298424) internal successors, (112276), 44417 states have internal predecessors, (112276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44418 states to 44418 states and 112276 transitions. [2022-01-18 14:26:24,408 INFO L78 Accepts]: Start accepts. Automaton has 44418 states and 112276 transitions. Word has length 59 [2022-01-18 14:26:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:24,408 INFO L470 AbstractCegarLoop]: Abstraction has 44418 states and 112276 transitions. [2022-01-18 14:26:24,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44418 states and 112276 transitions. [2022-01-18 14:26:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:24,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:24,443 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:24,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-01-18 14:26:24,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:24,644 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash 589924151, now seen corresponding path program 185 times [2022-01-18 14:26:24,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:24,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196861898] [2022-01-18 14:26:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:24,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196861898] [2022-01-18 14:26:24,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196861898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110607930] [2022-01-18 14:26:24,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:26:24,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:24,784 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 14:26:24,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-18 14:26:24,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:24,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:24,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:24,998 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:24,998 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 20 treesize of output 19 [2022-01-18 14:26:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:25,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110607930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:25,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:25,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-01-18 14:26:25,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658880193] [2022-01-18 14:26:25,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:25,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:26:25,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:26:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:26:25,097 INFO L87 Difference]: Start difference. First operand 44418 states and 112276 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:26,368 INFO L93 Difference]: Finished difference Result 57934 states and 141619 transitions. [2022-01-18 14:26:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:26:26,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:26,467 INFO L225 Difference]: With dead ends: 57934 [2022-01-18 14:26:26,468 INFO L226 Difference]: Without dead ends: 56623 [2022-01-18 14:26:26,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:26:26,468 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 458 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:26,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 788 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:26:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56623 states. [2022-01-18 14:26:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56623 to 37534. [2022-01-18 14:26:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37534 states, 37533 states have (on average 2.5064076945621188) internal successors, (94073), 37533 states have internal predecessors, (94073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37534 states to 37534 states and 94073 transitions. [2022-01-18 14:26:27,156 INFO L78 Accepts]: Start accepts. Automaton has 37534 states and 94073 transitions. Word has length 59 [2022-01-18 14:26:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:27,156 INFO L470 AbstractCegarLoop]: Abstraction has 37534 states and 94073 transitions. [2022-01-18 14:26:27,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 37534 states and 94073 transitions. [2022-01-18 14:26:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:27,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:27,184 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:27,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-01-18 14:26:27,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-01-18 14:26:27,384 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:27,385 INFO L85 PathProgramCache]: Analyzing trace with hash -607341279, now seen corresponding path program 91 times [2022-01-18 14:26:27,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:27,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939407772] [2022-01-18 14:26:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:27,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:27,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:27,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939407772] [2022-01-18 14:26:27,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939407772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:27,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286591561] [2022-01-18 14:26:27,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:26:27,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:27,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:27,492 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:27,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 14:26:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:27,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:27,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:27,818 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:26:27,818 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 15 [2022-01-18 14:26:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:27,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286591561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:27,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:27,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:26:27,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098844188] [2022-01-18 14:26:27,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:27,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:26:27,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:26:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:26:27,951 INFO L87 Difference]: Start difference. First operand 37534 states and 94073 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:28,613 INFO L93 Difference]: Finished difference Result 39915 states and 99122 transitions. [2022-01-18 14:26:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:26:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:28,679 INFO L225 Difference]: With dead ends: 39915 [2022-01-18 14:26:28,679 INFO L226 Difference]: Without dead ends: 39888 [2022-01-18 14:26:28,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:26:28,679 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 157 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:28,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 580 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:26:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39888 states. [2022-01-18 14:26:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39888 to 37512. [2022-01-18 14:26:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37512 states, 37511 states have (on average 2.504038815280851) internal successors, (93929), 37511 states have internal predecessors, (93929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37512 states to 37512 states and 93929 transitions. [2022-01-18 14:26:29,309 INFO L78 Accepts]: Start accepts. Automaton has 37512 states and 93929 transitions. Word has length 59 [2022-01-18 14:26:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:29,309 INFO L470 AbstractCegarLoop]: Abstraction has 37512 states and 93929 transitions. [2022-01-18 14:26:29,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 37512 states and 93929 transitions. [2022-01-18 14:26:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:29,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:29,439 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:29,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-01-18 14:26:29,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-01-18 14:26:29,639 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1514872123, now seen corresponding path program 186 times [2022-01-18 14:26:29,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:29,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38681900] [2022-01-18 14:26:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:29,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:29,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38681900] [2022-01-18 14:26:29,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38681900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731199553] [2022-01-18 14:26:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:26:29,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:29,746 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:29,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 14:26:29,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 14:26:29,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:26:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:30,085 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:26:30,085 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 16 [2022-01-18 14:26:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 82 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:26:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:30,360 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:26:30,360 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 15 [2022-01-18 14:26:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 37 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:30,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731199553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:30,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:30,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 26 [2022-01-18 14:26:30,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087719226] [2022-01-18 14:26:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:30,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 14:26:30,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 14:26:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:26:30,650 INFO L87 Difference]: Start difference. First operand 37512 states and 93929 transitions. Second operand has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:33,744 INFO L93 Difference]: Finished difference Result 51457 states and 127471 transitions. [2022-01-18 14:26:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 14:26:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:33,839 INFO L225 Difference]: With dead ends: 51457 [2022-01-18 14:26:33,839 INFO L226 Difference]: Without dead ends: 51376 [2022-01-18 14:26:33,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1206, Invalid=5274, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 14:26:33,840 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 615 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 3550 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:33,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1228 Invalid, 3652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3550 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 14:26:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51376 states. [2022-01-18 14:26:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51376 to 30856. [2022-01-18 14:26:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30856 states, 30855 states have (on average 2.4999189758548046) internal successors, (77135), 30855 states have internal predecessors, (77135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30856 states to 30856 states and 77135 transitions. [2022-01-18 14:26:34,638 INFO L78 Accepts]: Start accepts. Automaton has 30856 states and 77135 transitions. Word has length 59 [2022-01-18 14:26:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 30856 states and 77135 transitions. [2022-01-18 14:26:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30856 states and 77135 transitions. [2022-01-18 14:26:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:34,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:34,663 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:34,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-18 14:26:34,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:34,863 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash 901335943, now seen corresponding path program 187 times [2022-01-18 14:26:34,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:34,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377696554] [2022-01-18 14:26:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:34,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:34,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377696554] [2022-01-18 14:26:34,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377696554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965925875] [2022-01-18 14:26:34,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:26:34,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:34,988 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:34,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 14:26:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:35,182 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:26:35,182 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 15 [2022-01-18 14:26:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 14:26:35,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965925875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:35,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:35,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:26:35,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564250870] [2022-01-18 14:26:35,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:26:35,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:26:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:26:35,318 INFO L87 Difference]: Start difference. First operand 30856 states and 77135 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:35,903 INFO L93 Difference]: Finished difference Result 32996 states and 81479 transitions. [2022-01-18 14:26:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:26:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:35,954 INFO L225 Difference]: With dead ends: 32996 [2022-01-18 14:26:35,955 INFO L226 Difference]: Without dead ends: 32990 [2022-01-18 14:26:35,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:26:35,955 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 145 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:35,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 543 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:26:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32990 states. [2022-01-18 14:26:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32990 to 30910. [2022-01-18 14:26:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30910 states, 30909 states have (on average 2.499660293118509) internal successors, (77262), 30909 states have internal predecessors, (77262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30910 states to 30910 states and 77262 transitions. [2022-01-18 14:26:36,558 INFO L78 Accepts]: Start accepts. Automaton has 30910 states and 77262 transitions. Word has length 59 [2022-01-18 14:26:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:36,558 INFO L470 AbstractCegarLoop]: Abstraction has 30910 states and 77262 transitions. [2022-01-18 14:26:36,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 30910 states and 77262 transitions. [2022-01-18 14:26:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:36,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:36,582 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:36,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:36,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-01-18 14:26:36,783 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:36,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1251714019, now seen corresponding path program 188 times [2022-01-18 14:26:36,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:36,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569931769] [2022-01-18 14:26:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:36,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:36,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:36,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569931769] [2022-01-18 14:26:36,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569931769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:36,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734528313] [2022-01-18 14:26:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:26:36,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:36,891 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:36,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 14:26:36,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:26:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:36,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:37,097 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:37,097 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 20 treesize of output 19 [2022-01-18 14:26:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:37,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734528313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:37,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:37,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:26:37,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027113419] [2022-01-18 14:26:37,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:37,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:26:37,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:37,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:26:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:26:37,230 INFO L87 Difference]: Start difference. First operand 30910 states and 77262 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:38,070 INFO L93 Difference]: Finished difference Result 36506 states and 89309 transitions. [2022-01-18 14:26:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:26:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:38,129 INFO L225 Difference]: With dead ends: 36506 [2022-01-18 14:26:38,130 INFO L226 Difference]: Without dead ends: 36479 [2022-01-18 14:26:38,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:26:38,130 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 309 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:38,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 755 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:26:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36479 states. [2022-01-18 14:26:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36479 to 31408. [2022-01-18 14:26:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31408 states, 31407 states have (on average 2.49886967873404) internal successors, (78482), 31407 states have internal predecessors, (78482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31408 states to 31408 states and 78482 transitions. [2022-01-18 14:26:38,724 INFO L78 Accepts]: Start accepts. Automaton has 31408 states and 78482 transitions. Word has length 59 [2022-01-18 14:26:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:38,724 INFO L470 AbstractCegarLoop]: Abstraction has 31408 states and 78482 transitions. [2022-01-18 14:26:38,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 31408 states and 78482 transitions. [2022-01-18 14:26:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:38,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:38,749 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:38,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-01-18 14:26:38,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:38,949 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash -46707683, now seen corresponding path program 92 times [2022-01-18 14:26:38,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:38,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378596920] [2022-01-18 14:26:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:38,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 25 proven. 149 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:39,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:39,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378596920] [2022-01-18 14:26:39,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378596920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:39,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113681948] [2022-01-18 14:26:39,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:26:39,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:39,082 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:39,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 14:26:39,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:26:39,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:39,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:39,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:39,333 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:39,333 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 20 treesize of output 19 [2022-01-18 14:26:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:39,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113681948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:39,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:39,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-01-18 14:26:39,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665776605] [2022-01-18 14:26:39,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:39,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:26:39,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:26:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:26:39,466 INFO L87 Difference]: Start difference. First operand 31408 states and 78482 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:40,255 INFO L93 Difference]: Finished difference Result 32553 states and 80655 transitions. [2022-01-18 14:26:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:26:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:40,307 INFO L225 Difference]: With dead ends: 32553 [2022-01-18 14:26:40,307 INFO L226 Difference]: Without dead ends: 32491 [2022-01-18 14:26:40,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:26:40,307 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 158 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:40,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 596 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1648 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-01-18 14:26:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32491 states. [2022-01-18 14:26:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32491 to 31401. [2022-01-18 14:26:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31401 states, 31400 states have (on average 2.4981847133757964) internal successors, (78443), 31400 states have internal predecessors, (78443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31401 states to 31401 states and 78443 transitions. [2022-01-18 14:26:40,868 INFO L78 Accepts]: Start accepts. Automaton has 31401 states and 78443 transitions. Word has length 59 [2022-01-18 14:26:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:40,868 INFO L470 AbstractCegarLoop]: Abstraction has 31401 states and 78443 transitions. [2022-01-18 14:26:40,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 31401 states and 78443 transitions. [2022-01-18 14:26:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:40,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:40,893 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:40,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-18 14:26:41,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-01-18 14:26:41,094 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1096877485, now seen corresponding path program 189 times [2022-01-18 14:26:41,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:41,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254297773] [2022-01-18 14:26:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:41,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:41,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254297773] [2022-01-18 14:26:41,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254297773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836138028] [2022-01-18 14:26:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:26:41,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:41,212 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:41,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 14:26:41,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-18 14:26:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:41,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:41,423 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:41,423 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 20 treesize of output 19 [2022-01-18 14:26:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:41,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836138028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:41,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:41,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:26:41,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9797488] [2022-01-18 14:26:41,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:41,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:26:41,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:41,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:26:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:26:41,549 INFO L87 Difference]: Start difference. First operand 31401 states and 78443 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:42,753 INFO L93 Difference]: Finished difference Result 44715 states and 107963 transitions. [2022-01-18 14:26:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 14:26:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:42,824 INFO L225 Difference]: With dead ends: 44715 [2022-01-18 14:26:42,824 INFO L226 Difference]: Without dead ends: 44625 [2022-01-18 14:26:42,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 14:26:42,825 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 643 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:42,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 890 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:26:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44625 states. [2022-01-18 14:26:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44625 to 32952. [2022-01-18 14:26:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32952 states, 32951 states have (on average 2.4968893205062064) internal successors, (82275), 32951 states have internal predecessors, (82275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32952 states to 32952 states and 82275 transitions. [2022-01-18 14:26:43,513 INFO L78 Accepts]: Start accepts. Automaton has 32952 states and 82275 transitions. Word has length 59 [2022-01-18 14:26:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:43,513 INFO L470 AbstractCegarLoop]: Abstraction has 32952 states and 82275 transitions. [2022-01-18 14:26:43,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 32952 states and 82275 transitions. [2022-01-18 14:26:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:43,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:43,538 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:43,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-18 14:26:43,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:43,739 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1156568995, now seen corresponding path program 190 times [2022-01-18 14:26:43,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:43,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231494596] [2022-01-18 14:26:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:43,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:43,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231494596] [2022-01-18 14:26:43,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231494596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834612169] [2022-01-18 14:26:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:26:43,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:43,865 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:43,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 14:26:43,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:26:43,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:44,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:44,074 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:44,074 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 20 treesize of output 19 [2022-01-18 14:26:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834612169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:44,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:44,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:26:44,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197782559] [2022-01-18 14:26:44,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:44,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:26:44,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:26:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:26:44,188 INFO L87 Difference]: Start difference. First operand 32952 states and 82275 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:46,150 INFO L93 Difference]: Finished difference Result 64047 states and 152625 transitions. [2022-01-18 14:26:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 14:26:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:46,260 INFO L225 Difference]: With dead ends: 64047 [2022-01-18 14:26:46,261 INFO L226 Difference]: Without dead ends: 63813 [2022-01-18 14:26:46,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 14:26:46,261 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1291 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:46,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 1045 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:26:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63813 states. [2022-01-18 14:26:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63813 to 35982. [2022-01-18 14:26:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35982 states, 35981 states have (on average 2.498652066368361) internal successors, (89904), 35981 states have internal predecessors, (89904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35982 states to 35982 states and 89904 transitions. [2022-01-18 14:26:47,297 INFO L78 Accepts]: Start accepts. Automaton has 35982 states and 89904 transitions. Word has length 59 [2022-01-18 14:26:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:47,298 INFO L470 AbstractCegarLoop]: Abstraction has 35982 states and 89904 transitions. [2022-01-18 14:26:47,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 35982 states and 89904 transitions. [2022-01-18 14:26:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:47,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:47,320 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:47,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-01-18 14:26:47,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:47,520 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1309882861, now seen corresponding path program 191 times [2022-01-18 14:26:47,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:47,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312667953] [2022-01-18 14:26:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:47,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:47,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312667953] [2022-01-18 14:26:47,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312667953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945498374] [2022-01-18 14:26:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:26:47,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:47,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:47,653 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:47,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 14:26:47,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 14:26:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:47,875 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:47,875 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 20 treesize of output 19 [2022-01-18 14:26:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:47,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945498374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:47,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:47,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-01-18 14:26:47,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225265514] [2022-01-18 14:26:47,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:47,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:26:47,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:26:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:26:47,988 INFO L87 Difference]: Start difference. First operand 35982 states and 89904 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:50,886 INFO L93 Difference]: Finished difference Result 95352 states and 222369 transitions. [2022-01-18 14:26:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-18 14:26:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:51,062 INFO L225 Difference]: With dead ends: 95352 [2022-01-18 14:26:51,062 INFO L226 Difference]: Without dead ends: 94212 [2022-01-18 14:26:51,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10599 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 14:26:51,065 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 2533 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:51,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2533 Valid, 1001 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:26:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94212 states. [2022-01-18 14:26:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94212 to 36509. [2022-01-18 14:26:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36509 states, 36508 states have (on average 2.495096965048756) internal successors, (91091), 36508 states have internal predecessors, (91091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36509 states to 36509 states and 91091 transitions. [2022-01-18 14:26:52,150 INFO L78 Accepts]: Start accepts. Automaton has 36509 states and 91091 transitions. Word has length 59 [2022-01-18 14:26:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 36509 states and 91091 transitions. [2022-01-18 14:26:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 36509 states and 91091 transitions. [2022-01-18 14:26:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:52,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:52,176 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:52,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-01-18 14:26:52,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:52,376 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1161938077, now seen corresponding path program 192 times [2022-01-18 14:26:52,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:52,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758540539] [2022-01-18 14:26:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:52,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:52,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758540539] [2022-01-18 14:26:52,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758540539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022784326] [2022-01-18 14:26:52,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:26:52,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:52,632 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:52,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 14:26:52,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-18 14:26:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:26:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:52,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:52,846 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:52,846 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 20 treesize of output 19 [2022-01-18 14:26:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:26:52,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022784326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:52,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:52,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-01-18 14:26:52,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237896426] [2022-01-18 14:26:52,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:52,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:26:52,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:26:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:26:52,945 INFO L87 Difference]: Start difference. First operand 36509 states and 91091 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:26:57,674 INFO L93 Difference]: Finished difference Result 105862 states and 252539 transitions. [2022-01-18 14:26:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-01-18 14:26:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:26:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:26:57,896 INFO L225 Difference]: With dead ends: 105862 [2022-01-18 14:26:57,896 INFO L226 Difference]: Without dead ends: 105196 [2022-01-18 14:26:57,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 109 SyntacticMatches, 10 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29074 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2022-01-18 14:26:57,898 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 3373 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3373 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:26:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3373 Valid, 818 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:26:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105196 states. [2022-01-18 14:26:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105196 to 41049. [2022-01-18 14:26:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41049 states, 41048 states have (on average 2.506577665172481) internal successors, (102890), 41048 states have internal predecessors, (102890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41049 states to 41049 states and 102890 transitions. [2022-01-18 14:26:59,084 INFO L78 Accepts]: Start accepts. Automaton has 41049 states and 102890 transitions. Word has length 59 [2022-01-18 14:26:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:26:59,084 INFO L470 AbstractCegarLoop]: Abstraction has 41049 states and 102890 transitions. [2022-01-18 14:26:59,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:26:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 41049 states and 102890 transitions. [2022-01-18 14:26:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:26:59,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:26:59,111 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:26:59,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-01-18 14:26:59,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:59,311 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:26:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:26:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1965212115, now seen corresponding path program 193 times [2022-01-18 14:26:59,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:26:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529809178] [2022-01-18 14:26:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:26:59,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:26:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:59,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:26:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529809178] [2022-01-18 14:26:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529809178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:26:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890465956] [2022-01-18 14:26:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:26:59,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:26:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:26:59,459 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:26:59,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 14:26:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:26:59,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:26:59,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:26:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:59,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:26:59,666 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:26:59,666 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 20 treesize of output 19 [2022-01-18 14:26:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:26:59,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890465956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:26:59,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:26:59,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 17 [2022-01-18 14:26:59,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867449399] [2022-01-18 14:26:59,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:26:59,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:26:59,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:26:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:26:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:26:59,755 INFO L87 Difference]: Start difference. First operand 41049 states and 102890 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:00,699 INFO L93 Difference]: Finished difference Result 50432 states and 121896 transitions. [2022-01-18 14:27:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:27:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:00,786 INFO L225 Difference]: With dead ends: 50432 [2022-01-18 14:27:00,786 INFO L226 Difference]: Without dead ends: 49535 [2022-01-18 14:27:00,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 14:27:00,786 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 424 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:00,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 427 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:27:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49535 states. [2022-01-18 14:27:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49535 to 29178. [2022-01-18 14:27:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29178 states, 29177 states have (on average 2.488569763855091) internal successors, (72609), 29177 states have internal predecessors, (72609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29178 states to 29178 states and 72609 transitions. [2022-01-18 14:27:01,570 INFO L78 Accepts]: Start accepts. Automaton has 29178 states and 72609 transitions. Word has length 59 [2022-01-18 14:27:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:01,570 INFO L470 AbstractCegarLoop]: Abstraction has 29178 states and 72609 transitions. [2022-01-18 14:27:01,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29178 states and 72609 transitions. [2022-01-18 14:27:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:01,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:01,595 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:01,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-01-18 14:27:01,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2022-01-18 14:27:01,795 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash -529770347, now seen corresponding path program 93 times [2022-01-18 14:27:01,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:01,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524997593] [2022-01-18 14:27:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:01,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:01,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524997593] [2022-01-18 14:27:01,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524997593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027010718] [2022-01-18 14:27:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:01,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:01,949 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:01,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 14:27:01,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:27:01,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:01,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:01,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:02,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:02,161 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:02,161 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 20 treesize of output 19 [2022-01-18 14:27:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:02,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027010718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:02,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:02,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 17 [2022-01-18 14:27:02,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820155538] [2022-01-18 14:27:02,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:02,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:27:02,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:27:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:27:02,244 INFO L87 Difference]: Start difference. First operand 29178 states and 72609 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:03,023 INFO L93 Difference]: Finished difference Result 36791 states and 90369 transitions. [2022-01-18 14:27:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:27:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:03,079 INFO L225 Difference]: With dead ends: 36791 [2022-01-18 14:27:03,080 INFO L226 Difference]: Without dead ends: 36677 [2022-01-18 14:27:03,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 14:27:03,080 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 265 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:03,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 397 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:27:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36677 states. [2022-01-18 14:27:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36677 to 28599. [2022-01-18 14:27:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28599 states, 28598 states have (on average 2.488880341282607) internal successors, (71177), 28598 states have internal predecessors, (71177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28599 states to 28599 states and 71177 transitions. [2022-01-18 14:27:03,740 INFO L78 Accepts]: Start accepts. Automaton has 28599 states and 71177 transitions. Word has length 59 [2022-01-18 14:27:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:03,740 INFO L470 AbstractCegarLoop]: Abstraction has 28599 states and 71177 transitions. [2022-01-18 14:27:03,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28599 states and 71177 transitions. [2022-01-18 14:27:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:03,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:03,763 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:03,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 14:27:03,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-01-18 14:27:03,964 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1766590421, now seen corresponding path program 194 times [2022-01-18 14:27:03,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:03,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541927540] [2022-01-18 14:27:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:03,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:04,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:04,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541927540] [2022-01-18 14:27:04,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541927540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:04,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008731834] [2022-01-18 14:27:04,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:27:04,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:04,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:04,114 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:04,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 14:27:04,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:27:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:04,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:04,516 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:04,516 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 20 treesize of output 19 [2022-01-18 14:27:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:04,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008731834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:04,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:04,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2022-01-18 14:27:04,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978899968] [2022-01-18 14:27:04,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:04,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 14:27:04,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:04,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 14:27:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:27:04,616 INFO L87 Difference]: Start difference. First operand 28599 states and 71177 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:05,110 INFO L93 Difference]: Finished difference Result 28965 states and 71878 transitions. [2022-01-18 14:27:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:27:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:05,154 INFO L225 Difference]: With dead ends: 28965 [2022-01-18 14:27:05,154 INFO L226 Difference]: Without dead ends: 28805 [2022-01-18 14:27:05,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:27:05,155 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:05,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 467 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1296 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-01-18 14:27:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28805 states. [2022-01-18 14:27:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28805 to 28608. [2022-01-18 14:27:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28608 states, 28607 states have (on average 2.4878526234837626) internal successors, (71170), 28607 states have internal predecessors, (71170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28608 states to 28608 states and 71170 transitions. [2022-01-18 14:27:05,733 INFO L78 Accepts]: Start accepts. Automaton has 28608 states and 71170 transitions. Word has length 59 [2022-01-18 14:27:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:05,734 INFO L470 AbstractCegarLoop]: Abstraction has 28608 states and 71170 transitions. [2022-01-18 14:27:05,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 28608 states and 71170 transitions. [2022-01-18 14:27:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:05,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:05,756 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:05,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:05,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:05,957 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -577165717, now seen corresponding path program 195 times [2022-01-18 14:27:05,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:05,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498112421] [2022-01-18 14:27:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:05,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:06,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498112421] [2022-01-18 14:27:06,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498112421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922583104] [2022-01-18 14:27:06,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:06,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:06,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:06,124 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:06,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 14:27:06,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-18 14:27:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:06,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:06,586 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:06,586 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 20 treesize of output 19 [2022-01-18 14:27:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922583104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:06,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:06,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-01-18 14:27:06,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498836623] [2022-01-18 14:27:06,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:06,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:27:06,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:27:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:27:06,683 INFO L87 Difference]: Start difference. First operand 28608 states and 71170 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:07,085 INFO L93 Difference]: Finished difference Result 28836 states and 71559 transitions. [2022-01-18 14:27:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:27:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:07,131 INFO L225 Difference]: With dead ends: 28836 [2022-01-18 14:27:07,132 INFO L226 Difference]: Without dead ends: 28694 [2022-01-18 14:27:07,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:27:07,132 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 84 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:07,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 509 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 981 Invalid, 0 Unknown, 373 Unchecked, 0.3s Time] [2022-01-18 14:27:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28694 states. [2022-01-18 14:27:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28694 to 28000. [2022-01-18 14:27:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 2.4980535019107823) internal successors, (69943), 27999 states have internal predecessors, (69943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 69943 transitions. [2022-01-18 14:27:07,553 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 69943 transitions. Word has length 59 [2022-01-18 14:27:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:07,553 INFO L470 AbstractCegarLoop]: Abstraction has 28000 states and 69943 transitions. [2022-01-18 14:27:07,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 69943 transitions. [2022-01-18 14:27:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:07,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:07,575 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:07,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:07,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-18 14:27:07,776 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -930815113, now seen corresponding path program 94 times [2022-01-18 14:27:07,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301538650] [2022-01-18 14:27:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:07,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:08,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301538650] [2022-01-18 14:27:08,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301538650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475619093] [2022-01-18 14:27:08,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:27:08,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:08,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:08,059 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:08,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 14:27:08,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:27:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:08,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:08,273 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:08,274 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 20 treesize of output 19 [2022-01-18 14:27:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:08,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475619093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:08,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:08,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-01-18 14:27:08,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058263848] [2022-01-18 14:27:08,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:08,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:27:08,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:27:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:27:08,364 INFO L87 Difference]: Start difference. First operand 28000 states and 69943 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:09,142 INFO L93 Difference]: Finished difference Result 36340 states and 89470 transitions. [2022-01-18 14:27:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:27:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:09,198 INFO L225 Difference]: With dead ends: 36340 [2022-01-18 14:27:09,198 INFO L226 Difference]: Without dead ends: 36260 [2022-01-18 14:27:09,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:27:09,199 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:09,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 469 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36260 states. [2022-01-18 14:27:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36260 to 27856. [2022-01-18 14:27:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27856 states, 27855 states have (on average 2.496068928379106) internal successors, (69528), 27855 states have internal predecessors, (69528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27856 states to 27856 states and 69528 transitions. [2022-01-18 14:27:09,691 INFO L78 Accepts]: Start accepts. Automaton has 27856 states and 69528 transitions. Word has length 59 [2022-01-18 14:27:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:09,691 INFO L470 AbstractCegarLoop]: Abstraction has 27856 states and 69528 transitions. [2022-01-18 14:27:09,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 27856 states and 69528 transitions. [2022-01-18 14:27:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:09,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:09,713 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:09,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-01-18 14:27:09,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 14:27:09,913 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 509386743, now seen corresponding path program 196 times [2022-01-18 14:27:09,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:09,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865614669] [2022-01-18 14:27:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:09,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:10,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865614669] [2022-01-18 14:27:10,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865614669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082260708] [2022-01-18 14:27:10,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:27:10,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:10,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:10,054 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:10,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 14:27:10,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:27:10,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:10,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:10,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:10,418 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:10,418 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 20 treesize of output 19 [2022-01-18 14:27:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:10,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082260708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:10,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:10,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-01-18 14:27:10,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323820392] [2022-01-18 14:27:10,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:10,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:27:10,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:27:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:27:10,595 INFO L87 Difference]: Start difference. First operand 27856 states and 69528 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:10,999 INFO L93 Difference]: Finished difference Result 28195 states and 70172 transitions. [2022-01-18 14:27:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:27:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:11,042 INFO L225 Difference]: With dead ends: 28195 [2022-01-18 14:27:11,042 INFO L226 Difference]: Without dead ends: 28119 [2022-01-18 14:27:11,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:27:11,043 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:11,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 414 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 999 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-01-18 14:27:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28119 states. [2022-01-18 14:27:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28119 to 27919. [2022-01-18 14:27:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27919 states, 27918 states have (on average 2.4950927716885163) internal successors, (69658), 27918 states have internal predecessors, (69658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27919 states to 27919 states and 69658 transitions. [2022-01-18 14:27:11,471 INFO L78 Accepts]: Start accepts. Automaton has 27919 states and 69658 transitions. Word has length 59 [2022-01-18 14:27:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:11,472 INFO L470 AbstractCegarLoop]: Abstraction has 27919 states and 69658 transitions. [2022-01-18 14:27:11,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 27919 states and 69658 transitions. [2022-01-18 14:27:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:11,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:11,493 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:11,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-01-18 14:27:11,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:11,694 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1433383151, now seen corresponding path program 197 times [2022-01-18 14:27:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:11,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607342646] [2022-01-18 14:27:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:11,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:11,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607342646] [2022-01-18 14:27:11,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607342646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947609881] [2022-01-18 14:27:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:27:11,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:11,829 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:11,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 14:27:11,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 14:27:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:12,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:12,189 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:12,189 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 20 treesize of output 19 [2022-01-18 14:27:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:12,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947609881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:12,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:12,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-01-18 14:27:12,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530731116] [2022-01-18 14:27:12,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:12,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:27:12,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:27:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:27:12,297 INFO L87 Difference]: Start difference. First operand 27919 states and 69658 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:12,846 INFO L93 Difference]: Finished difference Result 28313 states and 70338 transitions. [2022-01-18 14:27:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:27:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:12,889 INFO L225 Difference]: With dead ends: 28313 [2022-01-18 14:27:12,889 INFO L226 Difference]: Without dead ends: 28201 [2022-01-18 14:27:12,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:27:12,890 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:12,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 540 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1336 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2022-01-18 14:27:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28201 states. [2022-01-18 14:27:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28201 to 27838. [2022-01-18 14:27:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27838 states, 27837 states have (on average 2.4949886841254445) internal successors, (69453), 27837 states have internal predecessors, (69453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27838 states to 27838 states and 69453 transitions. [2022-01-18 14:27:13,385 INFO L78 Accepts]: Start accepts. Automaton has 27838 states and 69453 transitions. Word has length 59 [2022-01-18 14:27:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:13,385 INFO L470 AbstractCegarLoop]: Abstraction has 27838 states and 69453 transitions. [2022-01-18 14:27:13,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27838 states and 69453 transitions. [2022-01-18 14:27:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:13,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:13,407 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:13,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-01-18 14:27:13,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:13,607 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash -256378591, now seen corresponding path program 198 times [2022-01-18 14:27:13,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:13,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993287173] [2022-01-18 14:27:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:13,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:13,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:13,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993287173] [2022-01-18 14:27:13,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993287173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:13,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879874562] [2022-01-18 14:27:13,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:27:13,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:13,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:13,759 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:13,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 14:27:13,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 14:27:13,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 14:27:13,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:14,288 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 14:27:14,289 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 16 [2022-01-18 14:27:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 117 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:14,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:15,310 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:27:15,311 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 15 [2022-01-18 14:27:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 66 proven. 109 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:15,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879874562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:15,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:15,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 19] total 40 [2022-01-18 14:27:15,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257264406] [2022-01-18 14:27:15,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 14:27:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 14:27:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:27:15,728 INFO L87 Difference]: Start difference. First operand 27838 states and 69453 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:18,874 INFO L93 Difference]: Finished difference Result 37739 states and 94039 transitions. [2022-01-18 14:27:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 14:27:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:18,933 INFO L225 Difference]: With dead ends: 37739 [2022-01-18 14:27:18,933 INFO L226 Difference]: Without dead ends: 37616 [2022-01-18 14:27:18,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3977 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2027, Invalid=8685, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 14:27:18,934 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 525 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:18,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 646 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2648 Invalid, 0 Unknown, 596 Unchecked, 0.9s Time] [2022-01-18 14:27:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37616 states. [2022-01-18 14:27:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37616 to 26480. [2022-01-18 14:27:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26480 states, 26479 states have (on average 2.500736432644737) internal successors, (66217), 26479 states have internal predecessors, (66217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26480 states to 26480 states and 66217 transitions. [2022-01-18 14:27:19,559 INFO L78 Accepts]: Start accepts. Automaton has 26480 states and 66217 transitions. Word has length 59 [2022-01-18 14:27:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:19,559 INFO L470 AbstractCegarLoop]: Abstraction has 26480 states and 66217 transitions. [2022-01-18 14:27:19,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 26480 states and 66217 transitions. [2022-01-18 14:27:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:19,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:19,581 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:19,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:19,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-01-18 14:27:19,782 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:19,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash -27751262, now seen corresponding path program 199 times [2022-01-18 14:27:19,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:19,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348678544] [2022-01-18 14:27:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:19,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:19,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348678544] [2022-01-18 14:27:19,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348678544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4970586] [2022-01-18 14:27:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:27:19,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:19,921 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:19,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 14:27:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:27:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:20,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:20,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4970586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:20,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:20,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 18 [2022-01-18 14:27:20,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995682934] [2022-01-18 14:27:20,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:20,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:27:20,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:27:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:20,463 INFO L87 Difference]: Start difference. First operand 26480 states and 66217 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:21,043 INFO L93 Difference]: Finished difference Result 30843 states and 76714 transitions. [2022-01-18 14:27:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:27:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:21,092 INFO L225 Difference]: With dead ends: 30843 [2022-01-18 14:27:21,093 INFO L226 Difference]: Without dead ends: 30843 [2022-01-18 14:27:21,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:27:21,093 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 341 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:21,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 231 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:27:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30843 states. [2022-01-18 14:27:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30843 to 28170. [2022-01-18 14:27:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28170 states, 28169 states have (on average 2.5181937590968797) internal successors, (70935), 28169 states have internal predecessors, (70935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28170 states to 28170 states and 70935 transitions. [2022-01-18 14:27:21,767 INFO L78 Accepts]: Start accepts. Automaton has 28170 states and 70935 transitions. Word has length 59 [2022-01-18 14:27:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:21,767 INFO L470 AbstractCegarLoop]: Abstraction has 28170 states and 70935 transitions. [2022-01-18 14:27:21,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 28170 states and 70935 transitions. [2022-01-18 14:27:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:21,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:21,788 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:21,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-01-18 14:27:21,988 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1947659307, now seen corresponding path program 95 times [2022-01-18 14:27:21,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143862331] [2022-01-18 14:27:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:21,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:22,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:22,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143862331] [2022-01-18 14:27:22,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143862331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:22,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030556185] [2022-01-18 14:27:22,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:27:22,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:22,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:22,159 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:22,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 14:27:22,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:27:22,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:22,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:22,370 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:22,370 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 20 treesize of output 19 [2022-01-18 14:27:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030556185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:22,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:22,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-01-18 14:27:22,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988393799] [2022-01-18 14:27:22,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:22,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:27:22,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:27:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:27:22,469 INFO L87 Difference]: Start difference. First operand 28170 states and 70935 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:23,219 INFO L93 Difference]: Finished difference Result 34907 states and 86804 transitions. [2022-01-18 14:27:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:27:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:23,272 INFO L225 Difference]: With dead ends: 34907 [2022-01-18 14:27:23,273 INFO L226 Difference]: Without dead ends: 34855 [2022-01-18 14:27:23,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:27:23,273 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 195 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:23,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 505 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34855 states. [2022-01-18 14:27:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34855 to 28217. [2022-01-18 14:27:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28217 states, 28216 states have (on average 2.517224269917777) internal successors, (71026), 28216 states have internal predecessors, (71026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28217 states to 28217 states and 71026 transitions. [2022-01-18 14:27:23,765 INFO L78 Accepts]: Start accepts. Automaton has 28217 states and 71026 transitions. Word has length 59 [2022-01-18 14:27:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:23,765 INFO L470 AbstractCegarLoop]: Abstraction has 28217 states and 71026 transitions. [2022-01-18 14:27:23,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 28217 states and 71026 transitions. [2022-01-18 14:27:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:23,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:23,916 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:23,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-01-18 14:27:24,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:24,117 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash -934950123, now seen corresponding path program 200 times [2022-01-18 14:27:24,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:24,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821854154] [2022-01-18 14:27:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:24,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:24,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821854154] [2022-01-18 14:27:24,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821854154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476614040] [2022-01-18 14:27:24,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:27:24,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:24,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:24,246 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:24,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 14:27:24,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:27:24,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:24,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:24,562 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:24,562 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 20 treesize of output 19 [2022-01-18 14:27:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:24,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476614040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:24,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:24,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-01-18 14:27:24,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910596795] [2022-01-18 14:27:24,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:24,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:27:24,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:27:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:24,681 INFO L87 Difference]: Start difference. First operand 28217 states and 71026 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:25,030 INFO L93 Difference]: Finished difference Result 28563 states and 71685 transitions. [2022-01-18 14:27:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:27:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:25,077 INFO L225 Difference]: With dead ends: 28563 [2022-01-18 14:27:25,077 INFO L226 Difference]: Without dead ends: 28471 [2022-01-18 14:27:25,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:25,078 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:25,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 398 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 806 Invalid, 0 Unknown, 278 Unchecked, 0.3s Time] [2022-01-18 14:27:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28471 states. [2022-01-18 14:27:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28471 to 28232. [2022-01-18 14:27:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28232 states, 28231 states have (on average 2.5164535439764797) internal successors, (71042), 28231 states have internal predecessors, (71042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28232 states to 28232 states and 71042 transitions. [2022-01-18 14:27:25,526 INFO L78 Accepts]: Start accepts. Automaton has 28232 states and 71042 transitions. Word has length 59 [2022-01-18 14:27:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:25,526 INFO L470 AbstractCegarLoop]: Abstraction has 28232 states and 71042 transitions. [2022-01-18 14:27:25,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 28232 states and 71042 transitions. [2022-01-18 14:27:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:25,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:25,547 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:25,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-01-18 14:27:25,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:25,748 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -332197791, now seen corresponding path program 201 times [2022-01-18 14:27:25,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:25,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893327924] [2022-01-18 14:27:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:25,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:25,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:25,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893327924] [2022-01-18 14:27:25,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893327924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:25,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029602861] [2022-01-18 14:27:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:25,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:25,896 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:25,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 14:27:25,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-01-18 14:27:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:26,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:26,188 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:26,188 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 20 treesize of output 19 [2022-01-18 14:27:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:26,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029602861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:26,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-01-18 14:27:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516237191] [2022-01-18 14:27:26,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:26,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:27:26,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:26,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:27:26,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:27:26,317 INFO L87 Difference]: Start difference. First operand 28232 states and 71042 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:26,943 INFO L93 Difference]: Finished difference Result 28662 states and 71800 transitions. [2022-01-18 14:27:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:27:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:26,985 INFO L225 Difference]: With dead ends: 28662 [2022-01-18 14:27:26,986 INFO L226 Difference]: Without dead ends: 28604 [2022-01-18 14:27:26,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:26,986 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 83 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:26,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 512 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:27:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28604 states. [2022-01-18 14:27:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28604 to 28217. [2022-01-18 14:27:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28217 states, 28216 states have (on average 2.516267366033456) internal successors, (70999), 28216 states have internal predecessors, (70999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28217 states to 28217 states and 70999 transitions. [2022-01-18 14:27:27,444 INFO L78 Accepts]: Start accepts. Automaton has 28217 states and 70999 transitions. Word has length 59 [2022-01-18 14:27:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:27,444 INFO L470 AbstractCegarLoop]: Abstraction has 28217 states and 70999 transitions. [2022-01-18 14:27:27,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 28217 states and 70999 transitions. [2022-01-18 14:27:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:27,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:27,467 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:27,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:27,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:27,667 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1243288107, now seen corresponding path program 202 times [2022-01-18 14:27:27,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:27,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036664473] [2022-01-18 14:27:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:27,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:27,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036664473] [2022-01-18 14:27:27,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036664473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143524708] [2022-01-18 14:27:27,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:27:27,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:27,806 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:27,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 14:27:27,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:27:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:28,153 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:28,154 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 20 treesize of output 19 [2022-01-18 14:27:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:28,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143524708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:28,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:28,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-01-18 14:27:28,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773333888] [2022-01-18 14:27:28,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:28,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 14:27:28,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:28,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 14:27:28,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:27:28,270 INFO L87 Difference]: Start difference. First operand 28217 states and 70999 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:28,877 INFO L93 Difference]: Finished difference Result 28545 states and 71562 transitions. [2022-01-18 14:27:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:27:28,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:28,920 INFO L225 Difference]: With dead ends: 28545 [2022-01-18 14:27:28,921 INFO L226 Difference]: Without dead ends: 28458 [2022-01-18 14:27:28,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:27:28,921 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 95 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:28,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 529 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1472 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-01-18 14:27:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28458 states. [2022-01-18 14:27:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28458 to 28049. [2022-01-18 14:27:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28049 states, 28048 states have (on average 2.5187535653166) internal successors, (70646), 28048 states have internal predecessors, (70646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28049 states to 28049 states and 70646 transitions. [2022-01-18 14:27:29,425 INFO L78 Accepts]: Start accepts. Automaton has 28049 states and 70646 transitions. Word has length 59 [2022-01-18 14:27:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:29,425 INFO L470 AbstractCegarLoop]: Abstraction has 28049 states and 70646 transitions. [2022-01-18 14:27:29,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28049 states and 70646 transitions. [2022-01-18 14:27:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:29,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:29,446 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:29,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-01-18 14:27:29,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-01-18 14:27:29,646 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1752428599, now seen corresponding path program 96 times [2022-01-18 14:27:29,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116386603] [2022-01-18 14:27:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:29,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:29,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116386603] [2022-01-18 14:27:29,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116386603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128513073] [2022-01-18 14:27:29,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:27:29,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:29,779 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 14:27:29,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 14:27:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:29,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:29,995 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:29,995 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 20 treesize of output 19 [2022-01-18 14:27:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128513073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:30,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:30,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-01-18 14:27:30,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956733256] [2022-01-18 14:27:30,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:30,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:27:30,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:27:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:27:30,106 INFO L87 Difference]: Start difference. First operand 28049 states and 70646 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:30,783 INFO L93 Difference]: Finished difference Result 34216 states and 84866 transitions. [2022-01-18 14:27:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:27:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:30,838 INFO L225 Difference]: With dead ends: 34216 [2022-01-18 14:27:30,838 INFO L226 Difference]: Without dead ends: 34186 [2022-01-18 14:27:30,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:27:30,838 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 171 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:30,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 498 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34186 states. [2022-01-18 14:27:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34186 to 28112. [2022-01-18 14:27:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28112 states, 28111 states have (on average 2.5191206289352923) internal successors, (70815), 28111 states have internal predecessors, (70815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28112 states to 28112 states and 70815 transitions. [2022-01-18 14:27:31,407 INFO L78 Accepts]: Start accepts. Automaton has 28112 states and 70815 transitions. Word has length 59 [2022-01-18 14:27:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:31,407 INFO L470 AbstractCegarLoop]: Abstraction has 28112 states and 70815 transitions. [2022-01-18 14:27:31,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28112 states and 70815 transitions. [2022-01-18 14:27:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:31,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:31,428 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:31,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-01-18 14:27:31,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-18 14:27:31,628 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1529586871, now seen corresponding path program 203 times [2022-01-18 14:27:31,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032386323] [2022-01-18 14:27:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:31,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:31,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032386323] [2022-01-18 14:27:31,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032386323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821353729] [2022-01-18 14:27:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:27:31,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:31,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:31,780 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:31,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 14:27:31,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 14:27:31,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:32,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:32,123 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:32,124 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 20 treesize of output 19 [2022-01-18 14:27:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821353729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:32,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:32,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-01-18 14:27:32,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105445127] [2022-01-18 14:27:32,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:32,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:27:32,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:27:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:27:32,253 INFO L87 Difference]: Start difference. First operand 28112 states and 70815 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:32,659 INFO L93 Difference]: Finished difference Result 28433 states and 71417 transitions. [2022-01-18 14:27:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:27:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:32,707 INFO L225 Difference]: With dead ends: 28433 [2022-01-18 14:27:32,707 INFO L226 Difference]: Without dead ends: 28381 [2022-01-18 14:27:32,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:27:32,708 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:32,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 402 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 984 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-18 14:27:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28381 states. [2022-01-18 14:27:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28381 to 28121. [2022-01-18 14:27:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28121 states, 28120 states have (on average 2.518705547652916) internal successors, (70826), 28120 states have internal predecessors, (70826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28121 states to 28121 states and 70826 transitions. [2022-01-18 14:27:33,265 INFO L78 Accepts]: Start accepts. Automaton has 28121 states and 70826 transitions. Word has length 59 [2022-01-18 14:27:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:33,265 INFO L470 AbstractCegarLoop]: Abstraction has 28121 states and 70826 transitions. [2022-01-18 14:27:33,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28121 states and 70826 transitions. [2022-01-18 14:27:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:33,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:33,286 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:33,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-01-18 14:27:33,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 14:27:33,486 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2036095647, now seen corresponding path program 204 times [2022-01-18 14:27:33,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028891954] [2022-01-18 14:27:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:33,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:33,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028891954] [2022-01-18 14:27:33,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028891954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253756718] [2022-01-18 14:27:33,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:27:33,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:33,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:33,620 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:33,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 14:27:33,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-18 14:27:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 14:27:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:33,824 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 16 treesize of output 12 [2022-01-18 14:27:33,827 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 8 treesize of output 1 [2022-01-18 14:27:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:33,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:33,939 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:33,939 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 20 treesize of output 19 [2022-01-18 14:27:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:34,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253756718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:34,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:34,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 23 [2022-01-18 14:27:34,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579784313] [2022-01-18 14:27:34,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:34,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 14:27:34,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:34,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 14:27:34,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:27:34,315 INFO L87 Difference]: Start difference. First operand 28121 states and 70826 transitions. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:36,252 INFO L93 Difference]: Finished difference Result 31629 states and 78128 transitions. [2022-01-18 14:27:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 14:27:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:36,302 INFO L225 Difference]: With dead ends: 31629 [2022-01-18 14:27:36,302 INFO L226 Difference]: Without dead ends: 31487 [2022-01-18 14:27:36,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:27:36,302 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 377 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 4214 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 4250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:36,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1801 Invalid, 4250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4214 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 14:27:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31487 states. [2022-01-18 14:27:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31487 to 28440. [2022-01-18 14:27:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28440 states, 28439 states have (on average 2.516298041421991) internal successors, (71561), 28439 states have internal predecessors, (71561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28440 states to 28440 states and 71561 transitions. [2022-01-18 14:27:36,851 INFO L78 Accepts]: Start accepts. Automaton has 28440 states and 71561 transitions. Word has length 59 [2022-01-18 14:27:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:36,851 INFO L470 AbstractCegarLoop]: Abstraction has 28440 states and 71561 transitions. [2022-01-18 14:27:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 28440 states and 71561 transitions. [2022-01-18 14:27:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:36,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:36,873 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:36,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-01-18 14:27:37,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-18 14:27:37,073 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:37,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1357566558, now seen corresponding path program 205 times [2022-01-18 14:27:37,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:37,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90759903] [2022-01-18 14:27:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:37,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:27:37,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90759903] [2022-01-18 14:27:37,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90759903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127717362] [2022-01-18 14:27:37,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:27:37,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:37,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:37,188 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:37,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 14:27:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:37,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 14:27:37,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:37,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:37,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127717362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:37,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:37,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-01-18 14:27:37,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260495887] [2022-01-18 14:27:37,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:37,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:27:37,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:27:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:27:37,702 INFO L87 Difference]: Start difference. First operand 28440 states and 71561 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:38,180 INFO L93 Difference]: Finished difference Result 35677 states and 89905 transitions. [2022-01-18 14:27:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:27:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:38,238 INFO L225 Difference]: With dead ends: 35677 [2022-01-18 14:27:38,238 INFO L226 Difference]: Without dead ends: 35677 [2022-01-18 14:27:38,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:27:38,239 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 284 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:38,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 170 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:27:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35677 states. [2022-01-18 14:27:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35677 to 32469. [2022-01-18 14:27:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32469 states, 32468 states have (on average 2.558457558211162) internal successors, (83068), 32468 states have internal predecessors, (83068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32469 states to 32469 states and 83068 transitions. [2022-01-18 14:27:38,967 INFO L78 Accepts]: Start accepts. Automaton has 32469 states and 83068 transitions. Word has length 59 [2022-01-18 14:27:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:38,968 INFO L470 AbstractCegarLoop]: Abstraction has 32469 states and 83068 transitions. [2022-01-18 14:27:38,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 32469 states and 83068 transitions. [2022-01-18 14:27:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:38,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:38,990 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:39,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-01-18 14:27:39,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:39,191 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash -714916075, now seen corresponding path program 97 times [2022-01-18 14:27:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:39,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431109965] [2022-01-18 14:27:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:39,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:39,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431109965] [2022-01-18 14:27:39,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431109965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891060526] [2022-01-18 14:27:39,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:27:39,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:39,309 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:39,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 14:27:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:39,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:39,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:39,522 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:39,522 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 20 treesize of output 19 [2022-01-18 14:27:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:39,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891060526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:39,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:39,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:27:39,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674264454] [2022-01-18 14:27:39,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:39,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:27:39,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:27:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:27:39,643 INFO L87 Difference]: Start difference. First operand 32469 states and 83068 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:40,307 INFO L93 Difference]: Finished difference Result 36868 states and 93091 transitions. [2022-01-18 14:27:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:27:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:40,363 INFO L225 Difference]: With dead ends: 36868 [2022-01-18 14:27:40,364 INFO L226 Difference]: Without dead ends: 36848 [2022-01-18 14:27:40,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:27:40,364 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 148 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:40,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 514 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36848 states. [2022-01-18 14:27:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36848 to 31352. [2022-01-18 14:27:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31352 states, 31351 states have (on average 2.5790245925169852) internal successors, (80855), 31351 states have internal predecessors, (80855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31352 states to 31352 states and 80855 transitions. [2022-01-18 14:27:40,986 INFO L78 Accepts]: Start accepts. Automaton has 31352 states and 80855 transitions. Word has length 59 [2022-01-18 14:27:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:40,986 INFO L470 AbstractCegarLoop]: Abstraction has 31352 states and 80855 transitions. [2022-01-18 14:27:40,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 31352 states and 80855 transitions. [2022-01-18 14:27:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:41,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:41,008 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:41,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-18 14:27:41,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-01-18 14:27:41,209 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash 174640619, now seen corresponding path program 206 times [2022-01-18 14:27:41,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:41,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029438712] [2022-01-18 14:27:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:41,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:41,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029438712] [2022-01-18 14:27:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029438712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946757346] [2022-01-18 14:27:41,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:27:41,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:41,342 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:41,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 14:27:41,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:27:41,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:41,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:41,608 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:41,608 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 20 treesize of output 19 [2022-01-18 14:27:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:41,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946757346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:41,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:41,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-01-18 14:27:41,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063850137] [2022-01-18 14:27:41,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 14:27:41,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 14:27:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:27:41,747 INFO L87 Difference]: Start difference. First operand 31352 states and 80855 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:42,042 INFO L93 Difference]: Finished difference Result 31893 states and 81931 transitions. [2022-01-18 14:27:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:27:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:42,093 INFO L225 Difference]: With dead ends: 31893 [2022-01-18 14:27:42,093 INFO L226 Difference]: Without dead ends: 31854 [2022-01-18 14:27:42,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 14:27:42,094 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:42,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 139 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 609 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-01-18 14:27:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31854 states. [2022-01-18 14:27:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31854 to 31409. [2022-01-18 14:27:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31409 states, 31408 states have (on average 2.578228476821192) internal successors, (80977), 31408 states have internal predecessors, (80977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31409 states to 31409 states and 80977 transitions. [2022-01-18 14:27:42,672 INFO L78 Accepts]: Start accepts. Automaton has 31409 states and 80977 transitions. Word has length 59 [2022-01-18 14:27:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:42,673 INFO L470 AbstractCegarLoop]: Abstraction has 31409 states and 80977 transitions. [2022-01-18 14:27:42,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 31409 states and 80977 transitions. [2022-01-18 14:27:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:42,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:42,695 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:42,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-01-18 14:27:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-01-18 14:27:42,895 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash 953912567, now seen corresponding path program 98 times [2022-01-18 14:27:42,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:42,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212427865] [2022-01-18 14:27:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:42,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:43,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212427865] [2022-01-18 14:27:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212427865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178192597] [2022-01-18 14:27:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:27:43,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:43,006 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:43,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 14:27:43,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:27:43,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:43,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:43,212 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:43,213 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 20 treesize of output 19 [2022-01-18 14:27:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:43,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178192597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:43,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:43,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:27:43,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307946217] [2022-01-18 14:27:43,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:43,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:27:43,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:27:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:27:43,338 INFO L87 Difference]: Start difference. First operand 31409 states and 80977 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:43,952 INFO L93 Difference]: Finished difference Result 33839 states and 86438 transitions. [2022-01-18 14:27:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:27:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:44,004 INFO L225 Difference]: With dead ends: 33839 [2022-01-18 14:27:44,004 INFO L226 Difference]: Without dead ends: 33829 [2022-01-18 14:27:44,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:27:44,004 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 124 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:44,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 322 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:27:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33829 states. [2022-01-18 14:27:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33829 to 31472. [2022-01-18 14:27:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31472 states, 31471 states have (on average 2.578246639763592) internal successors, (81140), 31471 states have internal predecessors, (81140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31472 states to 31472 states and 81140 transitions. [2022-01-18 14:27:44,686 INFO L78 Accepts]: Start accepts. Automaton has 31472 states and 81140 transitions. Word has length 59 [2022-01-18 14:27:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:44,686 INFO L470 AbstractCegarLoop]: Abstraction has 31472 states and 81140 transitions. [2022-01-18 14:27:44,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 31472 states and 81140 transitions. [2022-01-18 14:27:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:44,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:44,706 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:44,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-01-18 14:27:44,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:44,906 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2124264955, now seen corresponding path program 99 times [2022-01-18 14:27:44,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:44,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608860587] [2022-01-18 14:27:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:44,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:45,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608860587] [2022-01-18 14:27:45,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608860587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277669257] [2022-01-18 14:27:45,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:45,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:45,015 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-18 14:27:45,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:27:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:45,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:45,214 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:27:45,214 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 15 [2022-01-18 14:27:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:45,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277669257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:45,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:45,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:27:45,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242179625] [2022-01-18 14:27:45,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:45,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:27:45,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:45,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:27:45,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:27:45,344 INFO L87 Difference]: Start difference. First operand 31472 states and 81140 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:46,008 INFO L93 Difference]: Finished difference Result 32955 states and 84340 transitions. [2022-01-18 14:27:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:27:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:46,059 INFO L225 Difference]: With dead ends: 32955 [2022-01-18 14:27:46,060 INFO L226 Difference]: Without dead ends: 32942 [2022-01-18 14:27:46,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:46,060 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 134 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:46,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 600 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32942 states. [2022-01-18 14:27:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32942 to 31420. [2022-01-18 14:27:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31420 states, 31419 states have (on average 2.5774213055794264) internal successors, (80980), 31419 states have internal predecessors, (80980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31420 states to 31420 states and 80980 transitions. [2022-01-18 14:27:46,529 INFO L78 Accepts]: Start accepts. Automaton has 31420 states and 80980 transitions. Word has length 59 [2022-01-18 14:27:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:46,529 INFO L470 AbstractCegarLoop]: Abstraction has 31420 states and 80980 transitions. [2022-01-18 14:27:46,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 31420 states and 80980 transitions. [2022-01-18 14:27:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:46,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:46,550 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:46,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-01-18 14:27:46,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:46,751 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash -48488939, now seen corresponding path program 207 times [2022-01-18 14:27:46,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560890827] [2022-01-18 14:27:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:46,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:47,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560890827] [2022-01-18 14:27:47,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560890827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556418287] [2022-01-18 14:27:47,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:27:47,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:47,064 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:47,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-18 14:27:47,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 14:27:47,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:47,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:47,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:47,270 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:27:47,270 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 15 [2022-01-18 14:27:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556418287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:47,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:47,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-01-18 14:27:47,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12630149] [2022-01-18 14:27:47,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:47,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:27:47,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:27:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:27:47,404 INFO L87 Difference]: Start difference. First operand 31420 states and 80980 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:48,101 INFO L93 Difference]: Finished difference Result 32136 states and 82322 transitions. [2022-01-18 14:27:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:27:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:48,152 INFO L225 Difference]: With dead ends: 32136 [2022-01-18 14:27:48,152 INFO L226 Difference]: Without dead ends: 31947 [2022-01-18 14:27:48,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:48,152 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 144 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:48,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 595 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31947 states. [2022-01-18 14:27:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31947 to 30956. [2022-01-18 14:27:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30956 states, 30955 states have (on average 2.5835567759651106) internal successors, (79974), 30955 states have internal predecessors, (79974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30956 states to 30956 states and 79974 transitions. [2022-01-18 14:27:48,612 INFO L78 Accepts]: Start accepts. Automaton has 30956 states and 79974 transitions. Word has length 59 [2022-01-18 14:27:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:48,612 INFO L470 AbstractCegarLoop]: Abstraction has 30956 states and 79974 transitions. [2022-01-18 14:27:48,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30956 states and 79974 transitions. [2022-01-18 14:27:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:48,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:48,632 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:48,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-01-18 14:27:48,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:48,833 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash -662025119, now seen corresponding path program 208 times [2022-01-18 14:27:48,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:48,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570501869] [2022-01-18 14:27:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:48,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:48,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:48,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570501869] [2022-01-18 14:27:48,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570501869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:48,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004057846] [2022-01-18 14:27:48,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:27:48,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:48,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:48,971 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:48,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-01-18 14:27:49,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:27:49,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:49,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:49,180 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 14:27:49,180 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 15 [2022-01-18 14:27:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:27:49,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004057846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:49,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:49,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-01-18 14:27:49,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559330915] [2022-01-18 14:27:49,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:49,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:27:49,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:27:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:27:49,318 INFO L87 Difference]: Start difference. First operand 30956 states and 79974 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:49,970 INFO L93 Difference]: Finished difference Result 31856 states and 81857 transitions. [2022-01-18 14:27:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:27:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:50,021 INFO L225 Difference]: With dead ends: 31856 [2022-01-18 14:27:50,021 INFO L226 Difference]: Without dead ends: 31844 [2022-01-18 14:27:50,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:27:50,022 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 137 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:50,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 474 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:27:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31844 states. [2022-01-18 14:27:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31844 to 31002. [2022-01-18 14:27:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31002 states, 31001 states have (on average 2.583465049514532) internal successors, (80090), 31001 states have internal predecessors, (80090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31002 states to 31002 states and 80090 transitions. [2022-01-18 14:27:50,486 INFO L78 Accepts]: Start accepts. Automaton has 31002 states and 80090 transitions. Word has length 59 [2022-01-18 14:27:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:50,486 INFO L470 AbstractCegarLoop]: Abstraction has 31002 states and 80090 transitions. [2022-01-18 14:27:50,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:50,486 INFO L276 IsEmpty]: Start isEmpty. Operand 31002 states and 80090 transitions. [2022-01-18 14:27:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:50,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:50,507 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:50,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-01-18 14:27:50,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:50,708 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1479892215, now seen corresponding path program 209 times [2022-01-18 14:27:50,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:50,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127826196] [2022-01-18 14:27:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:50,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:50,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127826196] [2022-01-18 14:27:50,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127826196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944247109] [2022-01-18 14:27:50,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:27:50,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:50,816 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:50,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-01-18 14:27:50,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 14:27:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:50,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:51,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:51,029 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:51,029 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 20 treesize of output 19 [2022-01-18 14:27:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:51,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944247109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:51,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:51,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-01-18 14:27:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428277061] [2022-01-18 14:27:51,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:51,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:27:51,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:27:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:27:51,163 INFO L87 Difference]: Start difference. First operand 31002 states and 80090 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:52,144 INFO L93 Difference]: Finished difference Result 33564 states and 85777 transitions. [2022-01-18 14:27:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:27:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:52,191 INFO L225 Difference]: With dead ends: 33564 [2022-01-18 14:27:52,191 INFO L226 Difference]: Without dead ends: 33510 [2022-01-18 14:27:52,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:27:52,191 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 334 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:52,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 728 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:27:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33510 states. [2022-01-18 14:27:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33510 to 31298. [2022-01-18 14:27:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31298 states, 31297 states have (on average 2.5844649646931015) internal successors, (80886), 31297 states have internal predecessors, (80886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31298 states to 31298 states and 80886 transitions. [2022-01-18 14:27:52,649 INFO L78 Accepts]: Start accepts. Automaton has 31298 states and 80886 transitions. Word has length 59 [2022-01-18 14:27:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 31298 states and 80886 transitions. [2022-01-18 14:27:52,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31298 states and 80886 transitions. [2022-01-18 14:27:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:52,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:52,671 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:52,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-01-18 14:27:52,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-01-18 14:27:52,872 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1634728749, now seen corresponding path program 210 times [2022-01-18 14:27:52,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871548232] [2022-01-18 14:27:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:52,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:52,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871548232] [2022-01-18 14:27:52,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871548232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987633931] [2022-01-18 14:27:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:27:52,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:52,987 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:52,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-01-18 14:27:53,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 14:27:53,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:27:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:27:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:53,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:53,201 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:53,201 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 20 treesize of output 19 [2022-01-18 14:27:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:53,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987633931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:53,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:53,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-01-18 14:27:53,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44269176] [2022-01-18 14:27:53,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:53,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:27:53,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:27:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:27:53,325 INFO L87 Difference]: Start difference. First operand 31298 states and 80886 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:27:54,768 INFO L93 Difference]: Finished difference Result 37880 states and 95872 transitions. [2022-01-18 14:27:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:27:54,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:27:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:27:54,824 INFO L225 Difference]: With dead ends: 37880 [2022-01-18 14:27:54,824 INFO L226 Difference]: Without dead ends: 37712 [2022-01-18 14:27:54,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 14:27:54,824 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 709 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 2230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:27:54,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 995 Invalid, 2230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 14:27:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37712 states. [2022-01-18 14:27:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37712 to 32091. [2022-01-18 14:27:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32091 states, 32090 states have (on average 2.5860392645684014) internal successors, (82986), 32090 states have internal predecessors, (82986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32091 states to 32091 states and 82986 transitions. [2022-01-18 14:27:55,325 INFO L78 Accepts]: Start accepts. Automaton has 32091 states and 82986 transitions. Word has length 59 [2022-01-18 14:27:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:27:55,326 INFO L470 AbstractCegarLoop]: Abstraction has 32091 states and 82986 transitions. [2022-01-18 14:27:55,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:27:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 32091 states and 82986 transitions. [2022-01-18 14:27:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:27:55,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:27:55,347 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:27:55,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-01-18 14:27:55,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:55,547 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:27:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:27:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1575037239, now seen corresponding path program 211 times [2022-01-18 14:27:55,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:27:55,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320464935] [2022-01-18 14:27:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:27:55,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:27:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:55,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:27:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320464935] [2022-01-18 14:27:55,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320464935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:27:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387209862] [2022-01-18 14:27:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:27:55,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:27:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:27:55,671 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:27:55,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-01-18 14:27:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:27:55,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 14:27:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:27:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:27:55,917 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 20 treesize of output 14 [2022-01-18 14:27:55,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:27:55,919 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 10 treesize of output 1 [2022-01-18 14:27:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:55,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:27:56,055 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:27:56,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:27:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:27:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387209862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:27:56,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:27:56,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 31 [2022-01-18 14:27:56,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203262415] [2022-01-18 14:27:56,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:27:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 14:27:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:27:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 14:27:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:27:56,367 INFO L87 Difference]: Start difference. First operand 32091 states and 82986 transitions. Second operand has 32 states, 32 states have (on average 3.90625) internal successors, (125), 31 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:02,024 INFO L93 Difference]: Finished difference Result 60092 states and 146422 transitions. [2022-01-18 14:28:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-01-18 14:28:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 31 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:28:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:02,131 INFO L225 Difference]: With dead ends: 60092 [2022-01-18 14:28:02,131 INFO L226 Difference]: Without dead ends: 59529 [2022-01-18 14:28:02,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18230 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3426, Invalid=44316, Unknown=0, NotChecked=0, Total=47742 [2022-01-18 14:28:02,136 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 2606 mSDsluCounter, 4297 mSDsCounter, 0 mSdLazyCounter, 5787 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2606 SdHoareTripleChecker+Valid, 3153 SdHoareTripleChecker+Invalid, 5948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 5787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:02,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2606 Valid, 3153 Invalid, 5948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 5787 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 14:28:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59529 states. [2022-01-18 14:28:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59529 to 36165. [2022-01-18 14:28:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36165 states, 36164 states have (on average 2.5911127087711536) internal successors, (93705), 36164 states have internal predecessors, (93705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36165 states to 36165 states and 93705 transitions. [2022-01-18 14:28:03,009 INFO L78 Accepts]: Start accepts. Automaton has 36165 states and 93705 transitions. Word has length 59 [2022-01-18 14:28:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:03,009 INFO L470 AbstractCegarLoop]: Abstraction has 36165 states and 93705 transitions. [2022-01-18 14:28:03,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 31 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 36165 states and 93705 transitions. [2022-01-18 14:28:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:28:03,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:03,032 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:03,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-01-18 14:28:03,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-01-18 14:28:03,232 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1421723373, now seen corresponding path program 212 times [2022-01-18 14:28:03,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064741321] [2022-01-18 14:28:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:03,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:03,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064741321] [2022-01-18 14:28:03,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064741321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395666103] [2022-01-18 14:28:03,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:28:03,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:03,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:03,365 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:03,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-01-18 14:28:03,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:28:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 14:28:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:03,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:28:03,641 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 20 treesize of output 14 [2022-01-18 14:28:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:28:03,644 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 10 treesize of output 1 [2022-01-18 14:28:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:03,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:03,813 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:28:03,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:28:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:04,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395666103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:04,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:04,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 34 [2022-01-18 14:28:04,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257896173] [2022-01-18 14:28:04,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:04,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 14:28:04,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 14:28:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:28:04,267 INFO L87 Difference]: Start difference. First operand 36165 states and 93705 transitions. Second operand has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:14,480 INFO L93 Difference]: Finished difference Result 104404 states and 250580 transitions. [2022-01-18 14:28:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2022-01-18 14:28:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:28:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:14,843 INFO L225 Difference]: With dead ends: 104404 [2022-01-18 14:28:14,843 INFO L226 Difference]: Without dead ends: 102875 [2022-01-18 14:28:14,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57712 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8325, Invalid=129687, Unknown=0, NotChecked=0, Total=138012 [2022-01-18 14:28:14,846 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 3919 mSDsluCounter, 5681 mSDsCounter, 0 mSdLazyCounter, 7685 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3919 SdHoareTripleChecker+Valid, 4120 SdHoareTripleChecker+Invalid, 7916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 7685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:14,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3919 Valid, 4120 Invalid, 7916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 7685 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-18 14:28:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102875 states. [2022-01-18 14:28:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102875 to 41479. [2022-01-18 14:28:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41479 states, 41478 states have (on average 2.597569796036453) internal successors, (107742), 41478 states have internal predecessors, (107742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41479 states to 41479 states and 107742 transitions. [2022-01-18 14:28:16,082 INFO L78 Accepts]: Start accepts. Automaton has 41479 states and 107742 transitions. Word has length 59 [2022-01-18 14:28:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:16,082 INFO L470 AbstractCegarLoop]: Abstraction has 41479 states and 107742 transitions. [2022-01-18 14:28:16,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 41479 states and 107742 transitions. [2022-01-18 14:28:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:28:16,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:16,105 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:16,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-01-18 14:28:16,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-01-18 14:28:16,305 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -401422985, now seen corresponding path program 213 times [2022-01-18 14:28:16,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:16,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57127253] [2022-01-18 14:28:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:16,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:16,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:16,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57127253] [2022-01-18 14:28:16,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57127253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:16,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835539292] [2022-01-18 14:28:16,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:28:16,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:16,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:16,447 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:16,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-01-18 14:28:16,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 14:28:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:28:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:16,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:16,665 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:28:16,666 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 20 treesize of output 19 [2022-01-18 14:28:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835539292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:16,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:16,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-01-18 14:28:16,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354512741] [2022-01-18 14:28:16,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:16,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 14:28:16,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 14:28:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:28:16,765 INFO L87 Difference]: Start difference. First operand 41479 states and 107742 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:23,022 INFO L93 Difference]: Finished difference Result 125471 states and 307194 transitions. [2022-01-18 14:28:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2022-01-18 14:28:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:28:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:28:23,286 INFO L225 Difference]: With dead ends: 125471 [2022-01-18 14:28:23,286 INFO L226 Difference]: Without dead ends: 121997 [2022-01-18 14:28:23,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45898 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2022-01-18 14:28:23,293 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 5733 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5733 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:28:23,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5733 Valid, 1143 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 14:28:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121997 states. [2022-01-18 14:28:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121997 to 46815. [2022-01-18 14:28:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46815 states, 46814 states have (on average 2.6015721792626136) internal successors, (121790), 46814 states have internal predecessors, (121790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46815 states to 46815 states and 121790 transitions. [2022-01-18 14:28:25,006 INFO L78 Accepts]: Start accepts. Automaton has 46815 states and 121790 transitions. Word has length 59 [2022-01-18 14:28:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:28:25,006 INFO L470 AbstractCegarLoop]: Abstraction has 46815 states and 121790 transitions. [2022-01-18 14:28:25,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 46815 states and 121790 transitions. [2022-01-18 14:28:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:28:25,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:28:25,031 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:28:25,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-01-18 14:28:25,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2022-01-18 14:28:25,231 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:28:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:28:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash 401851053, now seen corresponding path program 214 times [2022-01-18 14:28:25,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:28:25,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156118653] [2022-01-18 14:28:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:28:25,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:28:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:28:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:25,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:28:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156118653] [2022-01-18 14:28:25,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156118653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:28:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998856217] [2022-01-18 14:28:25,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:28:25,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:28:25,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:28:25,382 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:28:25,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-01-18 14:28:25,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:28:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:28:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 14:28:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:28:25,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:28:25,706 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 20 treesize of output 14 [2022-01-18 14:28:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 14:28:25,707 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 10 treesize of output 1 [2022-01-18 14:28:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:25,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:28:25,948 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:28:25,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 14:28:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:28:26,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998856217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:28:26,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:28:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 40 [2022-01-18 14:28:26,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941644151] [2022-01-18 14:28:26,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:28:26,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 14:28:26,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:28:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 14:28:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:28:26,232 INFO L87 Difference]: Start difference. First operand 46815 states and 121790 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:28:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:28:59,755 INFO L93 Difference]: Finished difference Result 245198 states and 596100 transitions. [2022-01-18 14:28:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 958 states. [2022-01-18 14:28:59,756 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:28:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:00,424 INFO L225 Difference]: With dead ends: 245198 [2022-01-18 14:29:00,424 INFO L226 Difference]: Without dead ends: 242250 [2022-01-18 14:29:00,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 964 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423550 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=42841, Invalid=889349, Unknown=0, NotChecked=0, Total=932190 [2022-01-18 14:29:00,450 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 6830 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 10036 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6830 SdHoareTripleChecker+Valid, 5047 SdHoareTripleChecker+Invalid, 10453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 10036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:00,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6830 Valid, 5047 Invalid, 10453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 10036 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-18 14:29:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242250 states. [2022-01-18 14:29:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242250 to 63223. [2022-01-18 14:29:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63223 states, 63222 states have (on average 2.62084400999652) internal successors, (165695), 63222 states have internal predecessors, (165695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63223 states to 63223 states and 165695 transitions. [2022-01-18 14:29:03,721 INFO L78 Accepts]: Start accepts. Automaton has 63223 states and 165695 transitions. Word has length 59 [2022-01-18 14:29:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:03,721 INFO L470 AbstractCegarLoop]: Abstraction has 63223 states and 165695 transitions. [2022-01-18 14:29:03,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 63223 states and 165695 transitions. [2022-01-18 14:29:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:29:03,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:03,746 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:03,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:03,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:03,946 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash -819056201, now seen corresponding path program 215 times [2022-01-18 14:29:03,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:03,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119244005] [2022-01-18 14:29:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:03,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:04,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119244005] [2022-01-18 14:29:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119244005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:04,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176502523] [2022-01-18 14:29:04,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:04,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:04,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:04,106 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:04,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-01-18 14:29:04,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 14:29:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:29:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:04,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:04,323 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:29:04,323 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 20 treesize of output 19 [2022-01-18 14:29:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176502523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:04,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:04,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 18 [2022-01-18 14:29:04,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259579129] [2022-01-18 14:29:04,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:04,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 14:29:04,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 14:29:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:29:04,404 INFO L87 Difference]: Start difference. First operand 63223 states and 165695 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:05,476 INFO L93 Difference]: Finished difference Result 85806 states and 213818 transitions. [2022-01-18 14:29:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:29:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:29:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:05,629 INFO L225 Difference]: With dead ends: 85806 [2022-01-18 14:29:05,629 INFO L226 Difference]: Without dead ends: 82122 [2022-01-18 14:29:05,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:29:05,630 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 396 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:05,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 322 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:29:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82122 states. [2022-01-18 14:29:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82122 to 47374. [2022-01-18 14:29:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47374 states, 47373 states have (on average 2.56975492369071) internal successors, (121737), 47373 states have internal predecessors, (121737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47374 states to 47374 states and 121737 transitions. [2022-01-18 14:29:06,855 INFO L78 Accepts]: Start accepts. Automaton has 47374 states and 121737 transitions. Word has length 59 [2022-01-18 14:29:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 47374 states and 121737 transitions. [2022-01-18 14:29:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 47374 states and 121737 transitions. [2022-01-18 14:29:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 14:29:06,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:06,877 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:06,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:07,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:07,078 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1508780054, now seen corresponding path program 100 times [2022-01-18 14:29:07,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:07,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244721001] [2022-01-18 14:29:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:07,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 83 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:07,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244721001] [2022-01-18 14:29:07,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244721001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884885504] [2022-01-18 14:29:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:07,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:07,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:07,177 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:07,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-01-18 14:29:07,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:07,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:29:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:07,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 96 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:07,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884885504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:07,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:07,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 14] total 19 [2022-01-18 14:29:07,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431985450] [2022-01-18 14:29:07,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:07,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 14:29:07,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 14:29:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:29:07,675 INFO L87 Difference]: Start difference. First operand 47374 states and 121737 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:08,533 INFO L93 Difference]: Finished difference Result 61060 states and 153748 transitions. [2022-01-18 14:29:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:29:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 14:29:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:08,647 INFO L225 Difference]: With dead ends: 61060 [2022-01-18 14:29:08,648 INFO L226 Difference]: Without dead ends: 61013 [2022-01-18 14:29:08,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:29:08,648 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 260 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:08,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 357 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:29:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61013 states. [2022-01-18 14:29:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61013 to 52440. [2022-01-18 14:29:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52440 states, 52439 states have (on average 2.5725509639771924) internal successors, (134902), 52439 states have internal predecessors, (134902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52440 states to 52440 states and 134902 transitions. [2022-01-18 14:29:09,949 INFO L78 Accepts]: Start accepts. Automaton has 52440 states and 134902 transitions. Word has length 59 [2022-01-18 14:29:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 52440 states and 134902 transitions. [2022-01-18 14:29:09,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 52440 states and 134902 transitions. [2022-01-18 14:29:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:09,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:09,979 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:10,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:10,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:10,191 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1885248409, now seen corresponding path program 216 times [2022-01-18 14:29:10,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708900184] [2022-01-18 14:29:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:10,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:29:10,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:10,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708900184] [2022-01-18 14:29:10,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708900184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:10,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669038310] [2022-01-18 14:29:10,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:10,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:10,288 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:10,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-01-18 14:29:10,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 14:29:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:29:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:10,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:29:11,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669038310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:11,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:11,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 19] total 28 [2022-01-18 14:29:11,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309302493] [2022-01-18 14:29:11,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:11,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 14:29:11,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 14:29:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:29:11,112 INFO L87 Difference]: Start difference. First operand 52440 states and 134902 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:12,918 INFO L93 Difference]: Finished difference Result 57784 states and 147266 transitions. [2022-01-18 14:29:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 14:29:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 14:29:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:13,026 INFO L225 Difference]: With dead ends: 57784 [2022-01-18 14:29:13,026 INFO L226 Difference]: Without dead ends: 57734 [2022-01-18 14:29:13,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 14:29:13,027 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 724 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:13,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 971 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 14:29:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57734 states. [2022-01-18 14:29:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57734 to 55442. [2022-01-18 14:29:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55442 states, 55441 states have (on average 2.5720856405908985) internal successors, (142599), 55441 states have internal predecessors, (142599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55442 states to 55442 states and 142599 transitions. [2022-01-18 14:29:14,543 INFO L78 Accepts]: Start accepts. Automaton has 55442 states and 142599 transitions. Word has length 62 [2022-01-18 14:29:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:14,543 INFO L470 AbstractCegarLoop]: Abstraction has 55442 states and 142599 transitions. [2022-01-18 14:29:14,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 55442 states and 142599 transitions. [2022-01-18 14:29:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:14,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:14,566 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:14,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-01-18 14:29:14,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:14,767 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash 299029232, now seen corresponding path program 101 times [2022-01-18 14:29:14,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118102249] [2022-01-18 14:29:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:14,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:29:14,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118102249] [2022-01-18 14:29:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118102249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185563538] [2022-01-18 14:29:14,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:14,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:14,874 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:14,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-01-18 14:29:14,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:29:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 14:29:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:29:15,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 14:29:15,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185563538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:15,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:15,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-01-18 14:29:15,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303797732] [2022-01-18 14:29:15,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:15,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:29:15,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:29:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:15,246 INFO L87 Difference]: Start difference. First operand 55442 states and 142599 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:15,785 INFO L93 Difference]: Finished difference Result 57805 states and 148141 transitions. [2022-01-18 14:29:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:29:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 14:29:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:15,891 INFO L225 Difference]: With dead ends: 57805 [2022-01-18 14:29:15,891 INFO L226 Difference]: Without dead ends: 57766 [2022-01-18 14:29:15,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:29:15,892 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 104 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:15,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 431 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:29:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57766 states. [2022-01-18 14:29:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57766 to 56450. [2022-01-18 14:29:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56450 states, 56449 states have (on average 2.5734379705574946) internal successors, (145268), 56449 states have internal predecessors, (145268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56450 states to 56450 states and 145268 transitions. [2022-01-18 14:29:17,086 INFO L78 Accepts]: Start accepts. Automaton has 56450 states and 145268 transitions. Word has length 62 [2022-01-18 14:29:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:17,087 INFO L470 AbstractCegarLoop]: Abstraction has 56450 states and 145268 transitions. [2022-01-18 14:29:17,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 56450 states and 145268 transitions. [2022-01-18 14:29:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:17,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:17,113 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:17,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-01-18 14:29:17,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2022-01-18 14:29:17,314 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2107511118, now seen corresponding path program 10 times [2022-01-18 14:29:17,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631207211] [2022-01-18 14:29:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:17,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 33 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:17,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631207211] [2022-01-18 14:29:17,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631207211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47854545] [2022-01-18 14:29:17,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:29:17,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:17,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:17,511 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:17,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-01-18 14:29:17,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:29:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:29:17,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:17,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:18,113 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:29:18,113 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 20 treesize of output 19 [2022-01-18 14:29:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:29:18,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47854545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:18,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:18,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-01-18 14:29:18,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687684652] [2022-01-18 14:29:18,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:18,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 14:29:18,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 14:29:18,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:29:18,193 INFO L87 Difference]: Start difference. First operand 56450 states and 145268 transitions. Second operand has 34 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:18,940 INFO L93 Difference]: Finished difference Result 57070 states and 146498 transitions. [2022-01-18 14:29:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:29:18,941 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 14:29:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:19,041 INFO L225 Difference]: With dead ends: 57070 [2022-01-18 14:29:19,041 INFO L226 Difference]: Without dead ends: 56966 [2022-01-18 14:29:19,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:29:19,041 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:19,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 360 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 975 Invalid, 0 Unknown, 455 Unchecked, 0.3s Time] [2022-01-18 14:29:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56966 states. [2022-01-18 14:29:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56966 to 56960. [2022-01-18 14:29:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56960 states, 56959 states have (on average 2.5683035165645465) internal successors, (146288), 56959 states have internal predecessors, (146288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56960 states to 56960 states and 146288 transitions. [2022-01-18 14:29:20,208 INFO L78 Accepts]: Start accepts. Automaton has 56960 states and 146288 transitions. Word has length 62 [2022-01-18 14:29:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:20,209 INFO L470 AbstractCegarLoop]: Abstraction has 56960 states and 146288 transitions. [2022-01-18 14:29:20,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 56960 states and 146288 transitions. [2022-01-18 14:29:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:20,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:20,236 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:20,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-01-18 14:29:20,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:20,437 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash -916225714, now seen corresponding path program 11 times [2022-01-18 14:29:20,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:20,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355280369] [2022-01-18 14:29:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:20,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 33 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:20,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355280369] [2022-01-18 14:29:20,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355280369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432018161] [2022-01-18 14:29:20,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:29:20,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:20,619 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:20,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-01-18 14:29:20,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 14:29:20,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:29:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:20,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:21,162 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:29:21,162 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 20 treesize of output 19 [2022-01-18 14:29:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432018161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:21,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:21,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2022-01-18 14:29:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35678741] [2022-01-18 14:29:21,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:21,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 14:29:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 14:29:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:29:21,252 INFO L87 Difference]: Start difference. First operand 56960 states and 146288 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:21,907 INFO L93 Difference]: Finished difference Result 57238 states and 146770 transitions. [2022-01-18 14:29:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:29:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 14:29:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:22,014 INFO L225 Difference]: With dead ends: 57238 [2022-01-18 14:29:22,014 INFO L226 Difference]: Without dead ends: 57164 [2022-01-18 14:29:22,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:29:22,014 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:22,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 418 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1431 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2022-01-18 14:29:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57164 states. [2022-01-18 14:29:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57164 to 56972. [2022-01-18 14:29:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56972 states, 56971 states have (on average 2.5680258377069034) internal successors, (146303), 56971 states have internal predecessors, (146303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56972 states to 56972 states and 146303 transitions. [2022-01-18 14:29:23,216 INFO L78 Accepts]: Start accepts. Automaton has 56972 states and 146303 transitions. Word has length 62 [2022-01-18 14:29:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:23,216 INFO L470 AbstractCegarLoop]: Abstraction has 56972 states and 146303 transitions. [2022-01-18 14:29:23,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 56972 states and 146303 transitions. [2022-01-18 14:29:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:23,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:23,243 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:23,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-01-18 14:29:23,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:23,443 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -168723838, now seen corresponding path program 12 times [2022-01-18 14:29:23,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:23,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765125126] [2022-01-18 14:29:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:23,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 33 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765125126] [2022-01-18 14:29:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765125126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343197917] [2022-01-18 14:29:23,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:29:23,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:23,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:23,610 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:23,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-01-18 14:29:23,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 14:29:23,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:29:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:29:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:23,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:24,088 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:29:24,089 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 20 treesize of output 19 [2022-01-18 14:29:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:24,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343197917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:24,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:24,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-01-18 14:29:24,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049018082] [2022-01-18 14:29:24,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:24,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:29:24,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:29:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:29:24,183 INFO L87 Difference]: Start difference. First operand 56972 states and 146303 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:24,920 INFO L93 Difference]: Finished difference Result 57481 states and 147279 transitions. [2022-01-18 14:29:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:29:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 14:29:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:25,030 INFO L225 Difference]: With dead ends: 57481 [2022-01-18 14:29:25,030 INFO L226 Difference]: Without dead ends: 57416 [2022-01-18 14:29:25,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:29:25,031 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:25,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 351 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1050 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2022-01-18 14:29:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57416 states. [2022-01-18 14:29:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57416 to 57294. [2022-01-18 14:29:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57294 states, 57293 states have (on average 2.5651475747473516) internal successors, (146965), 57293 states have internal predecessors, (146965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57294 states to 57294 states and 146965 transitions. [2022-01-18 14:29:26,187 INFO L78 Accepts]: Start accepts. Automaton has 57294 states and 146965 transitions. Word has length 62 [2022-01-18 14:29:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:26,187 INFO L470 AbstractCegarLoop]: Abstraction has 57294 states and 146965 transitions. [2022-01-18 14:29:26,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 57294 states and 146965 transitions. [2022-01-18 14:29:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:26,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:26,214 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:26,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-01-18 14:29:26,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-01-18 14:29:26,414 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1788101170, now seen corresponding path program 13 times [2022-01-18 14:29:26,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345176396] [2022-01-18 14:29:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:26,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 33 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:26,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:26,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345176396] [2022-01-18 14:29:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345176396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:26,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634318100] [2022-01-18 14:29:26,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:29:26,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:26,581 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:26,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-01-18 14:29:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 14:29:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:29:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:26,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:29:27,050 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 14:29:27,050 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 20 treesize of output 19 [2022-01-18 14:29:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:29:27,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634318100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:29:27,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:29:27,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-01-18 14:29:27,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838404281] [2022-01-18 14:29:27,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:29:27,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 14:29:27,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:29:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 14:29:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:29:27,147 INFO L87 Difference]: Start difference. First operand 57294 states and 146965 transitions. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 27 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:29:27,718 INFO L93 Difference]: Finished difference Result 57444 states and 147222 transitions. [2022-01-18 14:29:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:29:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 27 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-18 14:29:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:29:27,822 INFO L225 Difference]: With dead ends: 57444 [2022-01-18 14:29:27,823 INFO L226 Difference]: Without dead ends: 57337 [2022-01-18 14:29:27,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:29:27,823 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:29:27,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 393 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1208 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-01-18 14:29:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57337 states. [2022-01-18 14:29:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57337 to 56948. [2022-01-18 14:29:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56948 states, 56947 states have (on average 2.567984266071962) internal successors, (146239), 56947 states have internal predecessors, (146239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56948 states to 56948 states and 146239 transitions. [2022-01-18 14:29:29,049 INFO L78 Accepts]: Start accepts. Automaton has 56948 states and 146239 transitions. Word has length 62 [2022-01-18 14:29:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:29:29,049 INFO L470 AbstractCegarLoop]: Abstraction has 56948 states and 146239 transitions. [2022-01-18 14:29:29,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 27 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:29:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 56948 states and 146239 transitions. [2022-01-18 14:29:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-18 14:29:29,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:29:29,076 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:29:29,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-01-18 14:29:29,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-01-18 14:29:29,277 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:29:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:29:29,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1860869977, now seen corresponding path program 217 times [2022-01-18 14:29:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:29:29,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858343211] [2022-01-18 14:29:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:29:29,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:29:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 14:29:29,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:29:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858343211] [2022-01-18 14:29:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858343211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:29:29,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744452392] [2022-01-18 14:29:29,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:29:29,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:29:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:29:29,373 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:29:29,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-01-18 14:29:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:29:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 14:29:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-01-18 14:29:29,872 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 14:29:29,875 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 14:29:29,889 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:29:29,889 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:29:29,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-01-18 14:29:30,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-01-18 14:29:30,075 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 63 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. [2022-01-18 14:29:30,077 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 14:29:30,077 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 14:29:30,079 INFO L732 BasicCegarLoop]: Path program histogram: [217, 101, 39, 13, 3, 2, 2, 1, 1] [2022-01-18 14:29:30,081 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:29:30,081 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:29:30,083 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:29:30 BasicIcfg [2022-01-18 14:29:30,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:29:30,083 INFO L158 Benchmark]: Toolchain (without parser) took 757933.54ms. Allocated memory was 346.0MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 309.2MB in the beginning and 13.9GB in the end (delta: -13.5GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2022-01-18 14:29:30,083 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.38ms. Allocated memory is still 346.0MB. Free memory is still 310.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:29:30,083 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.72ms. Allocated memory is still 346.0MB. Free memory was 309.2MB in the beginning and 307.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 14:29:30,083 INFO L158 Benchmark]: Boogie Preprocessor took 12.73ms. Allocated memory is still 346.0MB. Free memory was 307.7MB in the beginning and 306.8MB in the end (delta: 877.8kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:29:30,083 INFO L158 Benchmark]: RCFGBuilder took 164.52ms. Allocated memory is still 346.0MB. Free memory was 306.6MB in the beginning and 297.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 14:29:30,083 INFO L158 Benchmark]: TraceAbstraction took 757730.67ms. Allocated memory was 346.0MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 297.4MB in the beginning and 13.9GB in the end (delta: -13.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2022-01-18 14:29:30,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.38ms. Allocated memory is still 346.0MB. Free memory is still 310.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 21.72ms. Allocated memory is still 346.0MB. Free memory was 309.2MB in the beginning and 307.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.73ms. Allocated memory is still 346.0MB. Free memory was 307.7MB in the beginning and 306.8MB in the end (delta: 877.8kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 164.52ms. Allocated memory is still 346.0MB. Free memory was 306.6MB in the beginning and 297.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 757730.67ms. Allocated memory was 346.0MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 297.4MB in the beginning and 13.9GB in the end (delta: -13.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 63 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 63 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 63 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 757.6s, OverallIterations: 379, TraceHistogramMax: 9, PathProgramHistogramMax: 217, EmptinessCheckTime: 7.9s, AutomataDifference: 310.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110368 SdHoareTripleChecker+Valid, 134.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 110368 mSDsluCounter, 148079 SdHoareTripleChecker+Invalid, 110.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 23471 IncrementalHoareTripleChecker+Unchecked, 194914 mSDsCounter, 9471 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 374307 IncrementalHoareTripleChecker+Invalid, 407249 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9471 mSolverCounterUnsat, 16577 mSDtfsCounter, 374307 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45947 GetRequests, 31597 SyntacticMatches, 2708 SemanticMatches, 11642 ConstructedPredicates, 0 IntricatePredicates, 222 DeprecatedPredicates, 756220 ImplicationChecksByTransitivity, 153.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63223occurred in iteration=370, InterpolantAutomatonStates: 10976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 186.4s AutomataMinimizationTime, 378 MinimizatonAttempts, 1686365 StatesRemovedByMinimization, 376 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 164.0s InterpolantComputationTime, 34220 NumberOfCodeBlocks, 34205 NumberOfCodeBlocksAsserted, 2329 NumberOfCheckSat, 50112 ConstructedInterpolants, 907 QuantifiedInterpolants, 434597 SizeOfPredicates, 1461 NumberOfNonLiveVariables, 39179 ConjunctsInSsa, 8383 ConjunctsInUnsatCore, 1116 InterpolantComputations, 10 PerfectInterpolantSequences, 21937/115718 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown