/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:03:56,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:03:56,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:03:56,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:03:56,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-16 14:03:56,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-16 14:03:56,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-16 14:03:56,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 14:03:56,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:03:56,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:03:56,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:03:56,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:03:56,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:03:56,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:03:56,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:03:56,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:03:56,424 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:03:56,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:03:56,424 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:03:56,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:03:56,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:03:56,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:03:56,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:03:56,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:03:56,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:03:56,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:03:56,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:03:56,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:03:56,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:03:56,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:03:56,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:03:56,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:03:56,427 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:03:56,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:03:56,427 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:03:56,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:03:56,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:03:56,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:03:56,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:03:56,642 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:03:56,651 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:03:56,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2022-02-16 14:03:56,653 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2022-02-16 14:03:56,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:03:56,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:03:56,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:03:56,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:03:56,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:03:56,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,706 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:03:56,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:03:56,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:03:56,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:03:56,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:03:56,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:03:56,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:03:56,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:03:56,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:03:56,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/1) ... [2022-02-16 14:03:56,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:03:56,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:56,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 14:03:56,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 14:03:56,804 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:03:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:03:56,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:03:56,804 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:03:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:03:56,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:03:56,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:03:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:03:56,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:03:56,806 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 14:03:56,841 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:03:56,842 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:03:56,905 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:03:56,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:03:56,919 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:03:56,921 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:03:56 BoogieIcfgContainer [2022-02-16 14:03:56,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:03:56,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:03:56,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:03:56,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:03:56,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:03:56" (1/2) ... [2022-02-16 14:03:56,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a9292b and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:03:56, skipping insertion in model container [2022-02-16 14:03:56,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:03:56" (2/2) ... [2022-02-16 14:03:56,928 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2022-02-16 14:03:56,933 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:03:56,933 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:03:56,933 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:03:56,933 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:03:56,960 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-16 14:03:56,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:03:57,010 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, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 14:03:57,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 14:03:57,023 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-02-16 14:03:57,040 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2022-02-16 14:03:57,147 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 724 transitions and produced 362 states. [2022-02-16 14:03:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 257 states have (on average 1.5992217898832686) internal successors, (411), 361 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 14:03:57,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:57,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:57,167 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:57,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2067786381, now seen corresponding path program 1 times [2022-02-16 14:03:57,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:57,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790670165] [2022-02-16 14:03:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:57,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:57,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:57,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790670165] [2022-02-16 14:03:57,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790670165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:03:57,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:03:57,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:03:57,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581408749] [2022-02-16 14:03:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:03:57,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:03:57,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:03:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:03:57,360 INFO L87 Difference]: Start difference. First operand has 362 states, 257 states have (on average 1.5992217898832686) internal successors, (411), 361 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:57,419 INFO L93 Difference]: Finished difference Result 298 states and 337 transitions. [2022-02-16 14:03:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:03:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 14:03:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:57,432 INFO L225 Difference]: With dead ends: 298 [2022-02-16 14:03:57,433 INFO L226 Difference]: Without dead ends: 126 [2022-02-16 14:03:57,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:03:57,438 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:57,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-16 14:03:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 21. [2022-02-16 14:03:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2022-02-16 14:03:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-16 14:03:57,496 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2022-02-16 14:03:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:57,497 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-16 14:03:57,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-16 14:03:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 14:03:57,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:57,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:57,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:03:57,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1559680241, now seen corresponding path program 1 times [2022-02-16 14:03:57,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:57,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742805823] [2022-02-16 14:03:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:57,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:57,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:57,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742805823] [2022-02-16 14:03:57,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742805823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:57,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177120291] [2022-02-16 14:03:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:57,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:57,603 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) [2022-02-16 14:03:57,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 14:03:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 14:03:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:57,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:58,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177120291] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:58,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-16 14:03:58,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-02-16 14:03:58,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354125795] [2022-02-16 14:03:58,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:03:58,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 14:03:58,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 14:03:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:03:58,014 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-02-16 14:03:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:58,145 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-16 14:03:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:03:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2022-02-16 14:03:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:58,149 INFO L225 Difference]: With dead ends: 34 [2022-02-16 14:03:58,149 INFO L226 Difference]: Without dead ends: 34 [2022-02-16 14:03:58,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:58,152 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:58,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-16 14:03:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-02-16 14:03:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2022-02-16 14:03:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-16 14:03:58,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2022-02-16 14:03:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:58,161 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-16 14:03:58,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-02-16 14:03:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-16 14:03:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 14:03:58,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:58,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:58,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-16 14:03:58,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:58,365 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1550347153, now seen corresponding path program 1 times [2022-02-16 14:03:58,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:58,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967383768] [2022-02-16 14:03:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:58,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:58,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:58,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967383768] [2022-02-16 14:03:58,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967383768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:58,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017136172] [2022-02-16 14:03:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:58,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:58,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:03:58,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 14:03:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:58,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:58,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:58,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017136172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:58,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:58,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-16 14:03:58,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724010303] [2022-02-16 14:03:58,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:58,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:03:58,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:58,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:03:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:03:58,736 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:58,777 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-02-16 14:03:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:03:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 14:03:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:58,779 INFO L225 Difference]: With dead ends: 49 [2022-02-16 14:03:58,779 INFO L226 Difference]: Without dead ends: 39 [2022-02-16 14:03:58,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:03:58,783 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:58,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:03:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-16 14:03:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-02-16 14:03:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 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) [2022-02-16 14:03:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-02-16 14:03:58,787 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2022-02-16 14:03:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-02-16 14:03:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-02-16 14:03:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:03:58,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:58,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:58,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:58,999 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,SelfDestructingSolverStorable2 [2022-02-16 14:03:59,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash 79272723, now seen corresponding path program 2 times [2022-02-16 14:03:59,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:59,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084202919] [2022-02-16 14:03:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:59,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:59,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:59,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084202919] [2022-02-16 14:03:59,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084202919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:59,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810947572] [2022-02-16 14:03:59,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:03:59,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:59,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:03:59,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 14:03:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:03:59,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:59,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:03:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:59,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:59,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810947572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:59,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:59,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-16 14:03:59,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319688243] [2022-02-16 14:03:59,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:59,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:03:59,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:03:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:03:59,443 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:59,763 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2022-02-16 14:03:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:03:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:03:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:59,766 INFO L225 Difference]: With dead ends: 85 [2022-02-16 14:03:59,766 INFO L226 Difference]: Without dead ends: 81 [2022-02-16 14:03:59,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:03:59,767 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 137 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:59,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 59 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:03:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-16 14:03:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 34. [2022-02-16 14:03:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2022-02-16 14:03:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-16 14:03:59,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2022-02-16 14:03:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:59,773 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-16 14:03:59,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-16 14:03:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:03:59,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:59,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:59,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:59,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:59,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:03:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash 331147925, now seen corresponding path program 3 times [2022-02-16 14:03:59,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:59,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506033142] [2022-02-16 14:03:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:59,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:00,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506033142] [2022-02-16 14:04:00,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506033142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:00,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415817080] [2022-02-16 14:04:00,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:00,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:00,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:00,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:00,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 14:04:00,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:04:00,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:04:00,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415817080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:00,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:00,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-02-16 14:04:00,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752741743] [2022-02-16 14:04:00,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:00,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:04:00,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:04:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:04:00,308 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2022-02-16 14:04:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:00,345 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-02-16 14:04:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:04:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2022-02-16 14:04:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:00,346 INFO L225 Difference]: With dead ends: 77 [2022-02-16 14:04:00,346 INFO L226 Difference]: Without dead ends: 65 [2022-02-16 14:04:00,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:04:00,347 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:00,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:04:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-16 14:04:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2022-02-16 14:04:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 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) [2022-02-16 14:04:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-02-16 14:04:00,351 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2022-02-16 14:04:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:00,352 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-02-16 14:04:00,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2022-02-16 14:04:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-02-16 14:04:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:04:00,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:00,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:00,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:00,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:00,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -922318569, now seen corresponding path program 4 times [2022-02-16 14:04:00,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:00,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515799541] [2022-02-16 14:04:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:00,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:00,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515799541] [2022-02-16 14:04:00,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515799541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:00,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975967515] [2022-02-16 14:04:00,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:00,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:00,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:00,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:00,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 14:04:00,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:00,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:00,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:04:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:01,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975967515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:01,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:01,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 14:04:01,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125545223] [2022-02-16 14:04:01,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:04:01,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:04:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:04:01,066 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2022-02-16 14:04:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:01,648 INFO L93 Difference]: Finished difference Result 182 states and 226 transitions. [2022-02-16 14:04:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:04:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 25 [2022-02-16 14:04:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:01,650 INFO L225 Difference]: With dead ends: 182 [2022-02-16 14:04:01,650 INFO L226 Difference]: Without dead ends: 163 [2022-02-16 14:04:01,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=576, Invalid=1586, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 14:04:01,651 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 165 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:01,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 87 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-16 14:04:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 43. [2022-02-16 14:04:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 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) [2022-02-16 14:04:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-02-16 14:04:01,657 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 25 [2022-02-16 14:04:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:01,657 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-02-16 14:04:01,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2022-02-16 14:04:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-16 14:04:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:04:01,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:01,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:01,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:01,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:01,878 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash -125409383, now seen corresponding path program 5 times [2022-02-16 14:04:01,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:01,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959958926] [2022-02-16 14:04:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:01,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:01,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:01,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959958926] [2022-02-16 14:04:01,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959958926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:01,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466278479] [2022-02-16 14:04:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:01,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:01,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:01,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:04:01,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 14:04:02,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:04:02,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:02,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:02,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:02,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466278479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:02,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:02,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-02-16 14:04:02,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679546173] [2022-02-16 14:04:02,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:02,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 14:04:02,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 14:04:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:04:02,220 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) 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) [2022-02-16 14:04:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:02,265 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2022-02-16 14:04:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 14:04:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) 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 27 [2022-02-16 14:04:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:02,266 INFO L225 Difference]: With dead ends: 106 [2022-02-16 14:04:02,266 INFO L226 Difference]: Without dead ends: 92 [2022-02-16 14:04:02,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:04:02,267 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:02,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 125 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:04:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-16 14:04:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2022-02-16 14:04:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 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) [2022-02-16 14:04:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-02-16 14:04:02,272 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 27 [2022-02-16 14:04:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:02,272 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-02-16 14:04:02,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) 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) [2022-02-16 14:04:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-02-16 14:04:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:04:02,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:02,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:02,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:02,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:02,495 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1694960357, now seen corresponding path program 6 times [2022-02-16 14:04:02,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:02,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297715228] [2022-02-16 14:04:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:02,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:02,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:02,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297715228] [2022-02-16 14:04:02,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297715228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:02,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641107871] [2022-02-16 14:04:02,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:02,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:02,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:02,636 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) [2022-02-16 14:04:02,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 14:04:02,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:04:02,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:04:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:02,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:03,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641107871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:03,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:03,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-16 14:04:03,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434227549] [2022-02-16 14:04:03,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:03,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:04:03,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:04:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:04:03,161 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-02-16 14:04:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:04,054 INFO L93 Difference]: Finished difference Result 292 states and 365 transitions. [2022-02-16 14:04:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:04:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 29 [2022-02-16 14:04:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:04,061 INFO L225 Difference]: With dead ends: 292 [2022-02-16 14:04:04,061 INFO L226 Difference]: Without dead ends: 248 [2022-02-16 14:04:04,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1114, Invalid=3176, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:04:04,064 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 224 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:04,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 83 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-16 14:04:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 52. [2022-02-16 14:04:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 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) [2022-02-16 14:04:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-02-16 14:04:04,072 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 29 [2022-02-16 14:04:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:04,073 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-02-16 14:04:04,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-02-16 14:04:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-02-16 14:04:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-16 14:04:04,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:04,074 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:04,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:04,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:04,280 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 395174557, now seen corresponding path program 7 times [2022-02-16 14:04:04,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:04,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764625528] [2022-02-16 14:04:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:04,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:04,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:04,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764625528] [2022-02-16 14:04:04,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764625528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:04,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685665396] [2022-02-16 14:04:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:04,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:04,376 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) [2022-02-16 14:04:04,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 14:04:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:04:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:04,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:04,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685665396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:04,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:04,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-02-16 14:04:04,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998697051] [2022-02-16 14:04:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:04,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 14:04:04,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 14:04:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:04:04,627 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2022-02-16 14:04:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:04,697 INFO L93 Difference]: Finished difference Result 135 states and 163 transitions. [2022-02-16 14:04:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 14:04:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 31 [2022-02-16 14:04:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:04,698 INFO L225 Difference]: With dead ends: 135 [2022-02-16 14:04:04,698 INFO L226 Difference]: Without dead ends: 119 [2022-02-16 14:04:04,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:04:04,700 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:04,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 189 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:04:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-16 14:04:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2022-02-16 14:04:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.3404255319148937) internal successors, (126), 94 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2022-02-16 14:04:04,708 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 31 [2022-02-16 14:04:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:04,708 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2022-02-16 14:04:04,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2022-02-16 14:04:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2022-02-16 14:04:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-16 14:04:04,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:04,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:04,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:04,909 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,SelfDestructingSolverStorable8 [2022-02-16 14:04:04,910 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash -82190561, now seen corresponding path program 8 times [2022-02-16 14:04:04,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:04,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732336808] [2022-02-16 14:04:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:04,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:05,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:05,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732336808] [2022-02-16 14:04:05,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732336808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:05,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555846785] [2022-02-16 14:04:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:05,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:05,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:05,083 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) [2022-02-16 14:04:05,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 14:04:05,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:05,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:05,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:04:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:05,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:05,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555846785] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:05,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:05,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-16 14:04:05,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956624526] [2022-02-16 14:04:05,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:05,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:04:05,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:04:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:04:05,606 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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) [2022-02-16 14:04:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:06,893 INFO L93 Difference]: Finished difference Result 422 states and 528 transitions. [2022-02-16 14:04:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:04:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 33 [2022-02-16 14:04:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:06,898 INFO L225 Difference]: With dead ends: 422 [2022-02-16 14:04:06,898 INFO L226 Difference]: Without dead ends: 347 [2022-02-16 14:04:06,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1960, Invalid=5696, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:04:06,901 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 260 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:06,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 115 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-16 14:04:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 61. [2022-02-16 14:04:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 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) [2022-02-16 14:04:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-02-16 14:04:06,906 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 33 [2022-02-16 14:04:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:06,906 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-02-16 14:04:06,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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) [2022-02-16 14:04:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-02-16 14:04:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:04:06,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:06,907 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:06,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:07,122 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,SelfDestructingSolverStorable9 [2022-02-16 14:04:07,122 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash -216245343, now seen corresponding path program 9 times [2022-02-16 14:04:07,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:07,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169616002] [2022-02-16 14:04:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:07,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:07,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:07,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169616002] [2022-02-16 14:04:07,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169616002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:07,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215390217] [2022-02-16 14:04:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:07,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:07,264 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) [2022-02-16 14:04:07,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 14:04:07,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-16 14:04:07,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:04:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:07,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:07,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215390217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:07,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:07,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-02-16 14:04:07,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745877517] [2022-02-16 14:04:07,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:07,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 14:04:07,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 14:04:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:04:07,595 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:07,695 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2022-02-16 14:04:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:04:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:04:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:07,697 INFO L225 Difference]: With dead ends: 164 [2022-02-16 14:04:07,697 INFO L226 Difference]: Without dead ends: 146 [2022-02-16 14:04:07,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:04:07,698 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 40 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:07,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 267 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:04:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-16 14:04:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 116. [2022-02-16 14:04:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 115 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2022-02-16 14:04:07,710 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 35 [2022-02-16 14:04:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:07,710 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2022-02-16 14:04:07,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2022-02-16 14:04:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:04:07,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:07,711 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:07,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:07,927 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,SelfDestructingSolverStorable10 [2022-02-16 14:04:07,928 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash -9287901, now seen corresponding path program 10 times [2022-02-16 14:04:07,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:07,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986337103] [2022-02-16 14:04:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:07,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:08,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:08,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986337103] [2022-02-16 14:04:08,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986337103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:08,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171079311] [2022-02-16 14:04:08,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:08,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:08,089 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) [2022-02-16 14:04:08,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 14:04:08,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:08,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:08,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171079311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:08,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:08,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-02-16 14:04:08,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204035218] [2022-02-16 14:04:08,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:08,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:04:08,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:04:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:04:08,631 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 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) [2022-02-16 14:04:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:10,471 INFO L93 Difference]: Finished difference Result 570 states and 713 transitions. [2022-02-16 14:04:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-16 14:04:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 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 37 [2022-02-16 14:04:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:10,474 INFO L225 Difference]: With dead ends: 570 [2022-02-16 14:04:10,474 INFO L226 Difference]: Without dead ends: 459 [2022-02-16 14:04:10,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4045 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3214, Invalid=9442, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:04:10,478 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 302 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:10,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 164 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-02-16 14:04:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 70. [2022-02-16 14:04:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.289855072463768) internal successors, (89), 69 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) [2022-02-16 14:04:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-02-16 14:04:10,483 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 37 [2022-02-16 14:04:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:10,483 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-02-16 14:04:10,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 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) [2022-02-16 14:04:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-02-16 14:04:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:04:10,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:10,484 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:10,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:10,699 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,SelfDestructingSolverStorable11 [2022-02-16 14:04:10,699 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1123734181, now seen corresponding path program 11 times [2022-02-16 14:04:10,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:10,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185831263] [2022-02-16 14:04:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:10,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:10,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:10,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185831263] [2022-02-16 14:04:10,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185831263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:10,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641833623] [2022-02-16 14:04:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:10,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:10,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:10,817 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) [2022-02-16 14:04:10,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 14:04:10,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:04:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:04:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:11,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:11,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641833623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:11,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:11,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-02-16 14:04:11,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276601257] [2022-02-16 14:04:11,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:11,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:04:11,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:04:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:04:11,140 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) 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) [2022-02-16 14:04:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:11,261 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2022-02-16 14:04:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 14:04:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) 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 39 [2022-02-16 14:04:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:11,262 INFO L225 Difference]: With dead ends: 193 [2022-02-16 14:04:11,262 INFO L226 Difference]: Without dead ends: 173 [2022-02-16 14:04:11,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:04:11,263 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:11,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 359 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:04:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-16 14:04:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2022-02-16 14:04:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3529411764705883) internal successors, (184), 136 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2022-02-16 14:04:11,266 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 39 [2022-02-16 14:04:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:11,266 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2022-02-16 14:04:11,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) 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) [2022-02-16 14:04:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2022-02-16 14:04:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:04:11,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:11,267 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:11,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-16 14:04:11,467 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash 327888167, now seen corresponding path program 12 times [2022-02-16 14:04:11,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:11,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739469913] [2022-02-16 14:04:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:11,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:11,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:11,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739469913] [2022-02-16 14:04:11,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739469913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:11,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80065004] [2022-02-16 14:04:11,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:11,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:11,662 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) [2022-02-16 14:04:11,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 14:04:11,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-16 14:04:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:11,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:04:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:12,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:12,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80065004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:12,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:12,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-02-16 14:04:12,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518799025] [2022-02-16 14:04:12,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:12,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-16 14:04:12,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-16 14:04:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:04:12,321 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 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) [2022-02-16 14:04:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:14,719 INFO L93 Difference]: Finished difference Result 736 states and 920 transitions. [2022-02-16 14:04:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-16 14:04:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 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 41 [2022-02-16 14:04:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:14,722 INFO L225 Difference]: With dead ends: 736 [2022-02-16 14:04:14,722 INFO L226 Difference]: Without dead ends: 584 [2022-02-16 14:04:14,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6634 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4990, Invalid=14750, Unknown=0, NotChecked=0, Total=19740 [2022-02-16 14:04:14,728 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:14,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 109 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-16 14:04:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 79. [2022-02-16 14:04:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.294871794871795) internal successors, (101), 78 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) [2022-02-16 14:04:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-02-16 14:04:14,734 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 41 [2022-02-16 14:04:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-02-16 14:04:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 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) [2022-02-16 14:04:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-02-16 14:04:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:04:14,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:14,735 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:14,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:14,955 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,SelfDestructingSolverStorable13 [2022-02-16 14:04:14,955 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1267578967, now seen corresponding path program 13 times [2022-02-16 14:04:14,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:14,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583531612] [2022-02-16 14:04:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:14,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:15,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:15,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583531612] [2022-02-16 14:04:15,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583531612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:15,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968963899] [2022-02-16 14:04:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:15,108 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) [2022-02-16 14:04:15,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 14:04:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 14:04:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:15,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:15,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968963899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:15,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:15,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-02-16 14:04:15,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618927330] [2022-02-16 14:04:15,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:15,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 14:04:15,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 14:04:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:04:15,462 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2022-02-16 14:04:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:15,603 INFO L93 Difference]: Finished difference Result 222 states and 271 transitions. [2022-02-16 14:04:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:04:15,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 43 [2022-02-16 14:04:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:15,606 INFO L225 Difference]: With dead ends: 222 [2022-02-16 14:04:15,606 INFO L226 Difference]: Without dead ends: 200 [2022-02-16 14:04:15,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:04:15,607 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 56 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:15,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 465 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:04:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-16 14:04:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2022-02-16 14:04:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.356687898089172) internal successors, (213), 157 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 213 transitions. [2022-02-16 14:04:15,611 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 213 transitions. Word has length 43 [2022-02-16 14:04:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:15,611 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 213 transitions. [2022-02-16 14:04:15,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2022-02-16 14:04:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 213 transitions. [2022-02-16 14:04:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-16 14:04:15,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:15,612 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:15,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:15,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:15,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1200778965, now seen corresponding path program 14 times [2022-02-16 14:04:15,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:15,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975012209] [2022-02-16 14:04:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:15,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:16,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:16,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975012209] [2022-02-16 14:04:16,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975012209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:16,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271248918] [2022-02-16 14:04:16,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:16,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:16,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:16,025 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) [2022-02-16 14:04:16,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 14:04:16,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:04:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:16,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:16,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271248918] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:16,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:16,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2022-02-16 14:04:16,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105017688] [2022-02-16 14:04:16,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:16,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:04:16,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:04:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:04:16,775 INFO L87 Difference]: Start difference. First operand 158 states and 213 transitions. Second operand has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 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) [2022-02-16 14:04:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:19,951 INFO L93 Difference]: Finished difference Result 920 states and 1149 transitions. [2022-02-16 14:04:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-16 14:04:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 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 45 [2022-02-16 14:04:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:19,958 INFO L225 Difference]: With dead ends: 920 [2022-02-16 14:04:19,958 INFO L226 Difference]: Without dead ends: 722 [2022-02-16 14:04:19,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10350 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7416, Invalid=21996, Unknown=0, NotChecked=0, Total=29412 [2022-02-16 14:04:19,965 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 376 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:19,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 157 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:04:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-02-16 14:04:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 88. [2022-02-16 14:04:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 87 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) [2022-02-16 14:04:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-02-16 14:04:19,972 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 45 [2022-02-16 14:04:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:19,972 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-02-16 14:04:19,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 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) [2022-02-16 14:04:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-02-16 14:04:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-16 14:04:19,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:19,973 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:19,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:20,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-16 14:04:20,197 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1437877587, now seen corresponding path program 15 times [2022-02-16 14:04:20,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:20,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067680287] [2022-02-16 14:04:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:20,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:20,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:20,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067680287] [2022-02-16 14:04:20,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067680287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:20,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248159302] [2022-02-16 14:04:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:20,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:20,326 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) [2022-02-16 14:04:20,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 14:04:20,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-16 14:04:20,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:04:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:20,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:20,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248159302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:20,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:20,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-02-16 14:04:20,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848090930] [2022-02-16 14:04:20,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:20,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 14:04:20,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 14:04:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:04:20,687 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) 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) [2022-02-16 14:04:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:20,867 INFO L93 Difference]: Finished difference Result 251 states and 307 transitions. [2022-02-16 14:04:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:04:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) 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 [2022-02-16 14:04:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:20,871 INFO L225 Difference]: With dead ends: 251 [2022-02-16 14:04:20,871 INFO L226 Difference]: Without dead ends: 227 [2022-02-16 14:04:20,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:04:20,872 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 64 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:20,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 585 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-16 14:04:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 179. [2022-02-16 14:04:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.3595505617977528) internal successors, (242), 178 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 242 transitions. [2022-02-16 14:04:20,876 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 242 transitions. Word has length 47 [2022-02-16 14:04:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:20,876 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 242 transitions. [2022-02-16 14:04:20,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) 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) [2022-02-16 14:04:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 242 transitions. [2022-02-16 14:04:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-16 14:04:20,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:20,877 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:20,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:21,091 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,SelfDestructingSolverStorable16 [2022-02-16 14:04:21,092 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1151497007, now seen corresponding path program 16 times [2022-02-16 14:04:21,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:21,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150527469] [2022-02-16 14:04:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:21,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:21,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150527469] [2022-02-16 14:04:21,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150527469] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:21,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572748802] [2022-02-16 14:04:21,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:21,364 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) [2022-02-16 14:04:21,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 14:04:21,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:04:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:22,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572748802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:22,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:22,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-02-16 14:04:22,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482189088] [2022-02-16 14:04:22,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:22,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-16 14:04:22,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-16 14:04:22,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 14:04:22,208 INFO L87 Difference]: Start difference. First operand 179 states and 242 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 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) [2022-02-16 14:04:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:26,317 INFO L93 Difference]: Finished difference Result 1122 states and 1400 transitions. [2022-02-16 14:04:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-16 14:04:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 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 49 [2022-02-16 14:04:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:26,320 INFO L225 Difference]: With dead ends: 1122 [2022-02-16 14:04:26,320 INFO L226 Difference]: Without dead ends: 873 [2022-02-16 14:04:26,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15494 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10634, Invalid=31596, Unknown=0, NotChecked=0, Total=42230 [2022-02-16 14:04:26,324 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 499 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:26,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 173 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:04:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-02-16 14:04:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 97. [2022-02-16 14:04:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 96 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) [2022-02-16 14:04:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-02-16 14:04:26,330 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 49 [2022-02-16 14:04:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-02-16 14:04:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 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) [2022-02-16 14:04:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-02-16 14:04:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-16 14:04:26,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:26,331 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:26,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:26,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 14:04:26,547 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -53466191, now seen corresponding path program 17 times [2022-02-16 14:04:26,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:26,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477661915] [2022-02-16 14:04:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:26,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:26,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:26,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477661915] [2022-02-16 14:04:26,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477661915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:26,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775734051] [2022-02-16 14:04:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:26,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:26,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:26,702 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) [2022-02-16 14:04:26,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 14:04:26,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-16 14:04:26,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:04:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:26,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:27,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775734051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:27,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:27,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-02-16 14:04:27,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968724893] [2022-02-16 14:04:27,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:27,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:04:27,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:04:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:04:27,080 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-16 14:04:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:27,263 INFO L93 Difference]: Finished difference Result 280 states and 343 transitions. [2022-02-16 14:04:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:04:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 51 [2022-02-16 14:04:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:27,272 INFO L225 Difference]: With dead ends: 280 [2022-02-16 14:04:27,272 INFO L226 Difference]: Without dead ends: 254 [2022-02-16 14:04:27,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:04:27,274 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 72 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:27,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 719 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-16 14:04:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 200. [2022-02-16 14:04:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3618090452261307) internal successors, (271), 199 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 271 transitions. [2022-02-16 14:04:27,278 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 271 transitions. Word has length 51 [2022-02-16 14:04:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:27,278 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 271 transitions. [2022-02-16 14:04:27,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-16 14:04:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 271 transitions. [2022-02-16 14:04:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-16 14:04:27,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:27,279 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:27,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:27,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:27,495 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1540173005, now seen corresponding path program 18 times [2022-02-16 14:04:27,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:27,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737681602] [2022-02-16 14:04:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:27,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:27,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:27,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737681602] [2022-02-16 14:04:27,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737681602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:27,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523266276] [2022-02-16 14:04:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:27,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:27,770 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) [2022-02-16 14:04:27,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 14:04:27,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-02-16 14:04:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:04:27,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:28,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:28,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523266276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:28,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:28,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2022-02-16 14:04:28,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130609082] [2022-02-16 14:04:28,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:28,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:04:28,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:04:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:04:28,686 INFO L87 Difference]: Start difference. First operand 200 states and 271 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 55 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) [2022-02-16 14:04:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:33,832 INFO L93 Difference]: Finished difference Result 1342 states and 1673 transitions. [2022-02-16 14:04:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-16 14:04:33,833 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 55 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 53 [2022-02-16 14:04:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:33,835 INFO L225 Difference]: With dead ends: 1342 [2022-02-16 14:04:33,835 INFO L226 Difference]: Without dead ends: 1037 [2022-02-16 14:04:33,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22407 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14800, Invalid=44006, Unknown=0, NotChecked=0, Total=58806 [2022-02-16 14:04:33,840 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 578 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:33,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 195 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:04:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-02-16 14:04:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 106. [2022-02-16 14:04:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3047619047619048) internal successors, (137), 105 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) [2022-02-16 14:04:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-02-16 14:04:33,848 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 53 [2022-02-16 14:04:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:33,848 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-02-16 14:04:33,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 55 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) [2022-02-16 14:04:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-02-16 14:04:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-16 14:04:33,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:33,849 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:33,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:34,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:34,063 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1178035531, now seen corresponding path program 19 times [2022-02-16 14:04:34,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:34,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132447705] [2022-02-16 14:04:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:34,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:34,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:34,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132447705] [2022-02-16 14:04:34,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132447705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:34,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397964490] [2022-02-16 14:04:34,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:34,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:34,215 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) [2022-02-16 14:04:34,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 14:04:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:34,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-16 14:04:34,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:34,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:34,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397964490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:34,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:34,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-02-16 14:04:34,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750909416] [2022-02-16 14:04:34,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:34,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:04:34,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:04:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:04:34,600 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2022-02-16 14:04:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:34,826 INFO L93 Difference]: Finished difference Result 309 states and 379 transitions. [2022-02-16 14:04:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 14:04:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 55 [2022-02-16 14:04:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:34,827 INFO L225 Difference]: With dead ends: 309 [2022-02-16 14:04:34,827 INFO L226 Difference]: Without dead ends: 281 [2022-02-16 14:04:34,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:04:34,828 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 80 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:34,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 867 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-16 14:04:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 221. [2022-02-16 14:04:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.3636363636363635) internal successors, (300), 220 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 300 transitions. [2022-02-16 14:04:34,832 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 300 transitions. Word has length 55 [2022-02-16 14:04:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 300 transitions. [2022-02-16 14:04:34,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2022-02-16 14:04:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 300 transitions. [2022-02-16 14:04:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-16 14:04:34,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:34,833 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:34,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:35,043 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,SelfDestructingSolverStorable20 [2022-02-16 14:04:35,043 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 413643063, now seen corresponding path program 20 times [2022-02-16 14:04:35,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:35,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053266012] [2022-02-16 14:04:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:35,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:35,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:35,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053266012] [2022-02-16 14:04:35,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053266012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:35,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928167286] [2022-02-16 14:04:35,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:35,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:35,362 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) [2022-02-16 14:04:35,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 14:04:35,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:35,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 14:04:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:35,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:36,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928167286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:36,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:36,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-02-16 14:04:36,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420711796] [2022-02-16 14:04:36,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:36,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-16 14:04:36,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-16 14:04:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2978, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:04:36,373 INFO L87 Difference]: Start difference. First operand 221 states and 300 transitions. Second operand has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 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) [2022-02-16 14:04:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:42,839 INFO L93 Difference]: Finished difference Result 1580 states and 1968 transitions. [2022-02-16 14:04:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-02-16 14:04:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 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 57 [2022-02-16 14:04:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:42,844 INFO L225 Difference]: With dead ends: 1580 [2022-02-16 14:04:42,844 INFO L226 Difference]: Without dead ends: 1214 [2022-02-16 14:04:42,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31465 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20084, Invalid=59722, Unknown=0, NotChecked=0, Total=79806 [2022-02-16 14:04:42,847 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 660 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:42,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 188 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:04:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-02-16 14:04:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 115. [2022-02-16 14:04:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2022-02-16 14:04:42,855 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 57 [2022-02-16 14:04:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:42,855 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2022-02-16 14:04:42,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 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) [2022-02-16 14:04:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2022-02-16 14:04:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-16 14:04:42,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:42,856 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:42,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:43,071 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,SelfDestructingSolverStorable21 [2022-02-16 14:04:43,072 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash -461502535, now seen corresponding path program 21 times [2022-02-16 14:04:43,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:43,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564687626] [2022-02-16 14:04:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:43,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:43,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:43,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564687626] [2022-02-16 14:04:43,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564687626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:43,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699844452] [2022-02-16 14:04:43,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:43,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:43,270 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) [2022-02-16 14:04:43,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 14:04:43,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-16 14:04:43,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:43,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-16 14:04:43,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:43,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:43,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699844452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:43,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:43,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-02-16 14:04:43,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931731530] [2022-02-16 14:04:43,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:43,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:04:43,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:04:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:04:43,702 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) 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) [2022-02-16 14:04:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:43,959 INFO L93 Difference]: Finished difference Result 338 states and 415 transitions. [2022-02-16 14:04:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:04:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) 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 [2022-02-16 14:04:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:43,961 INFO L225 Difference]: With dead ends: 338 [2022-02-16 14:04:43,961 INFO L226 Difference]: Without dead ends: 308 [2022-02-16 14:04:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:04:43,962 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 88 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:43,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1029 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:04:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-16 14:04:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 242. [2022-02-16 14:04:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.3651452282157677) internal successors, (329), 241 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 329 transitions. [2022-02-16 14:04:43,967 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 329 transitions. Word has length 59 [2022-02-16 14:04:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:43,967 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 329 transitions. [2022-02-16 14:04:43,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) 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) [2022-02-16 14:04:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 329 transitions. [2022-02-16 14:04:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-16 14:04:43,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:43,968 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:43,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:44,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:44,183 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -116781765, now seen corresponding path program 22 times [2022-02-16 14:04:44,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:44,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428429537] [2022-02-16 14:04:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:44,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:44,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:44,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428429537] [2022-02-16 14:04:44,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428429537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:44,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477632262] [2022-02-16 14:04:44,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:44,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:44,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:44,564 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) [2022-02-16 14:04:44,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 14:04:44,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:44,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:44,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:04:44,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:45,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:45,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477632262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:45,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:45,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2022-02-16 14:04:45,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557121521] [2022-02-16 14:04:45,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:45,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-16 14:04:45,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-16 14:04:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3499, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:04:45,776 INFO L87 Difference]: Start difference. First operand 242 states and 329 transitions. Second operand has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 65 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:53,953 INFO L93 Difference]: Finished difference Result 1836 states and 2285 transitions. [2022-02-16 14:04:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-02-16 14:04:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 65 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-02-16 14:04:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:53,957 INFO L225 Difference]: With dead ends: 1836 [2022-02-16 14:04:53,957 INFO L226 Difference]: Without dead ends: 1404 [2022-02-16 14:04:53,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43084 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=26670, Invalid=79280, Unknown=0, NotChecked=0, Total=105950 [2022-02-16 14:04:53,962 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 702 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:53,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 250 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:04:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-16 14:04:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 124. [2022-02-16 14:04:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 123 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2022-02-16 14:04:53,970 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 61 [2022-02-16 14:04:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:53,970 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2022-02-16 14:04:53,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 65 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2022-02-16 14:04:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-16 14:04:53,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:53,971 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:53,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:54,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:54,191 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:54,191 INFO L85 PathProgramCache]: Analyzing trace with hash 901345981, now seen corresponding path program 23 times [2022-02-16 14:04:54,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:54,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83868351] [2022-02-16 14:04:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:54,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:54,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:54,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83868351] [2022-02-16 14:04:54,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83868351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:54,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770510332] [2022-02-16 14:04:54,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:54,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:54,381 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) [2022-02-16 14:04:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 14:04:54,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-02-16 14:04:54,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-16 14:04:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:54,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:54,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770510332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:54,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:54,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-02-16 14:04:54,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563260499] [2022-02-16 14:04:54,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:04:54,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:04:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:04:54,849 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 15 states, 15 states have (on average 4.2) 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) [2022-02-16 14:04:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:55,159 INFO L93 Difference]: Finished difference Result 367 states and 451 transitions. [2022-02-16 14:04:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:04:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) 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 63 [2022-02-16 14:04:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:55,161 INFO L225 Difference]: With dead ends: 367 [2022-02-16 14:04:55,161 INFO L226 Difference]: Without dead ends: 335 [2022-02-16 14:04:55,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:04:55,161 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 96 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:55,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1205 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:04:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-16 14:04:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 263. [2022-02-16 14:04:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.366412213740458) internal successors, (358), 262 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 358 transitions. [2022-02-16 14:04:55,167 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 358 transitions. Word has length 63 [2022-02-16 14:04:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:55,167 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 358 transitions. [2022-02-16 14:04:55,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) 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) [2022-02-16 14:04:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 358 transitions. [2022-02-16 14:04:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-16 14:04:55,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:55,168 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:55,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:55,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-16 14:04:55,383 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:04:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1910695743, now seen corresponding path program 24 times [2022-02-16 14:04:55,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:55,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713996730] [2022-02-16 14:04:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:55,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:55,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:55,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713996730] [2022-02-16 14:04:55,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713996730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:55,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90503851] [2022-02-16 14:04:55,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:04:55,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:55,758 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) [2022-02-16 14:04:55,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 14:04:55,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-16 14:04:55,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:04:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:57,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90503851] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:57,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:57,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-02-16 14:04:57,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558252792] [2022-02-16 14:04:57,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:57,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-16 14:04:57,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-16 14:04:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2022-02-16 14:04:57,112 INFO L87 Difference]: Start difference. First operand 263 states and 358 transitions. Second operand has 71 states, 71 states have (on average 2.1690140845070425) internal successors, (154), 70 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:07,195 INFO L93 Difference]: Finished difference Result 2110 states and 2624 transitions. [2022-02-16 14:05:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2022-02-16 14:05:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1690140845070425) internal successors, (154), 70 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-02-16 14:05:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:07,199 INFO L225 Difference]: With dead ends: 2110 [2022-02-16 14:05:07,199 INFO L226 Difference]: Without dead ends: 1607 [2022-02-16 14:05:07,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57715 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=34756, Invalid=103256, Unknown=0, NotChecked=0, Total=138012 [2022-02-16 14:05:07,204 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 830 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:07,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 251 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:05:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-02-16 14:05:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 133. [2022-02-16 14:05:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3106060606060606) internal successors, (173), 132 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2022-02-16 14:05:07,213 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 65 [2022-02-16 14:05:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:07,213 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2022-02-16 14:05:07,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1690140845070425) internal successors, (154), 70 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2022-02-16 14:05:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-16 14:05:07,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:07,214 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:07,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 14:05:07,437 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,SelfDestructingSolverStorable25 [2022-02-16 14:05:07,438 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash -607921215, now seen corresponding path program 25 times [2022-02-16 14:05:07,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:07,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192025174] [2022-02-16 14:05:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:07,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:07,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:07,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192025174] [2022-02-16 14:05:07,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192025174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:07,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337407507] [2022-02-16 14:05:07,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:05:07,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:07,676 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) [2022-02-16 14:05:07,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 14:05:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-16 14:05:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:08,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:08,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337407507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:08,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:08,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-02-16 14:05:08,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101476204] [2022-02-16 14:05:08,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:08,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:05:08,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:05:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:05:08,300 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2022-02-16 14:05:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:08,645 INFO L93 Difference]: Finished difference Result 396 states and 487 transitions. [2022-02-16 14:05:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:05:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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 67 [2022-02-16 14:05:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:08,646 INFO L225 Difference]: With dead ends: 396 [2022-02-16 14:05:08,647 INFO L226 Difference]: Without dead ends: 362 [2022-02-16 14:05:08,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:05:08,647 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 104 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:08,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1395 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:05:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-16 14:05:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 284. [2022-02-16 14:05:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.3674911660777385) internal successors, (387), 283 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 387 transitions. [2022-02-16 14:05:08,652 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 387 transitions. Word has length 67 [2022-02-16 14:05:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:08,652 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 387 transitions. [2022-02-16 14:05:08,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2022-02-16 14:05:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 387 transitions. [2022-02-16 14:05:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-16 14:05:08,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:08,653 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:08,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 14:05:08,876 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,SelfDestructingSolverStorable26 [2022-02-16 14:05:08,877 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:08,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1161510723, now seen corresponding path program 26 times [2022-02-16 14:05:08,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:08,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383320051] [2022-02-16 14:05:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:08,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:09,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:09,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383320051] [2022-02-16 14:05:09,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383320051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:09,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740882718] [2022-02-16 14:05:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:05:09,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:09,289 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) [2022-02-16 14:05:09,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 14:05:09,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:05:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 14:05:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:10,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:10,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740882718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:10,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:10,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2022-02-16 14:05:10,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111215266] [2022-02-16 14:05:10,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:10,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-16 14:05:10,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-16 14:05:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2022-02-16 14:05:10,751 INFO L87 Difference]: Start difference. First operand 284 states and 387 transitions. Second operand has 76 states, 76 states have (on average 2.1578947368421053) internal successors, (164), 75 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:23,127 INFO L93 Difference]: Finished difference Result 2402 states and 2985 transitions. [2022-02-16 14:05:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2022-02-16 14:05:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1578947368421053) internal successors, (164), 75 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-02-16 14:05:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:23,131 INFO L225 Difference]: With dead ends: 2402 [2022-02-16 14:05:23,131 INFO L226 Difference]: Without dead ends: 1823 [2022-02-16 14:05:23,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 419 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75849 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=44554, Invalid=132266, Unknown=0, NotChecked=0, Total=176820 [2022-02-16 14:05:23,138 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 768 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:23,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 259 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 14:05:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2022-02-16 14:05:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 142. [2022-02-16 14:05:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3120567375886525) internal successors, (185), 141 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) [2022-02-16 14:05:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2022-02-16 14:05:23,146 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 69 [2022-02-16 14:05:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:23,146 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2022-02-16 14:05:23,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1578947368421053) internal successors, (164), 75 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2022-02-16 14:05:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-16 14:05:23,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:23,147 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:23,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 14:05:23,363 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,SelfDestructingSolverStorable27 [2022-02-16 14:05:23,363 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 979780293, now seen corresponding path program 27 times [2022-02-16 14:05:23,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:23,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780543338] [2022-02-16 14:05:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:23,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:23,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:23,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780543338] [2022-02-16 14:05:23,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780543338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:23,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470743866] [2022-02-16 14:05:23,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:05:23,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:23,631 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) [2022-02-16 14:05:23,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 14:05:23,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-02-16 14:05:23,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-16 14:05:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:24,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:24,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470743866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:24,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:24,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-02-16 14:05:24,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673010458] [2022-02-16 14:05:24,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:05:24,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:05:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:05:24,289 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) 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) [2022-02-16 14:05:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:24,681 INFO L93 Difference]: Finished difference Result 425 states and 523 transitions. [2022-02-16 14:05:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:05:24,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) 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 71 [2022-02-16 14:05:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:24,683 INFO L225 Difference]: With dead ends: 425 [2022-02-16 14:05:24,683 INFO L226 Difference]: Without dead ends: 389 [2022-02-16 14:05:24,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:05:24,684 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 112 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:24,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1599 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:05:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-16 14:05:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2022-02-16 14:05:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.368421052631579) internal successors, (416), 304 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 416 transitions. [2022-02-16 14:05:24,689 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 416 transitions. Word has length 71 [2022-02-16 14:05:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:24,689 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 416 transitions. [2022-02-16 14:05:24,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) 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) [2022-02-16 14:05:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 416 transitions. [2022-02-16 14:05:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-16 14:05:24,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:24,690 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:24,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:05:24,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 14:05:24,916 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:24,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1969482425, now seen corresponding path program 28 times [2022-02-16 14:05:24,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:24,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078344627] [2022-02-16 14:05:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:24,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:25,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:25,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078344627] [2022-02-16 14:05:25,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078344627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:25,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383803891] [2022-02-16 14:05:25,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:05:25,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:25,404 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) [2022-02-16 14:05:25,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 14:05:25,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:05:25,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:05:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:26,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:26,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383803891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:26,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:26,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2022-02-16 14:05:26,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232644294] [2022-02-16 14:05:26,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-16 14:05:26,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-16 14:05:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=5314, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:05:26,919 INFO L87 Difference]: Start difference. First operand 305 states and 416 transitions. Second operand has 81 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 80 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:41,723 INFO L93 Difference]: Finished difference Result 2712 states and 3368 transitions. [2022-02-16 14:05:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 396 states. [2022-02-16 14:05:41,723 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 80 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-02-16 14:05:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:41,729 INFO L225 Difference]: With dead ends: 2712 [2022-02-16 14:05:41,729 INFO L226 Difference]: Without dead ends: 2052 [2022-02-16 14:05:41,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98012 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=56290, Invalid=166966, Unknown=0, NotChecked=0, Total=223256 [2022-02-16 14:05:41,739 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 971 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:41,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 253 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-16 14:05:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2022-02-16 14:05:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 151. [2022-02-16 14:05:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3133333333333332) internal successors, (197), 150 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2022-02-16 14:05:41,749 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 73 [2022-02-16 14:05:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:41,749 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2022-02-16 14:05:41,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 80 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2022-02-16 14:05:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-16 14:05:41,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:41,750 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:41,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:05:41,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:41,962 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1427527735, now seen corresponding path program 29 times [2022-02-16 14:05:41,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:41,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76902076] [2022-02-16 14:05:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:41,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:42,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:42,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76902076] [2022-02-16 14:05:42,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76902076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:42,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228412694] [2022-02-16 14:05:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:05:42,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:42,248 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) [2022-02-16 14:05:42,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 14:05:42,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-02-16 14:05:42,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:42,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2022-02-16 14:05:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:42,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:42,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228412694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:42,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:42,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-02-16 14:05:42,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006081499] [2022-02-16 14:05:42,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:42,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:05:42,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:05:42,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:05:42,903 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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) [2022-02-16 14:05:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:43,346 INFO L93 Difference]: Finished difference Result 454 states and 559 transitions. [2022-02-16 14:05:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:05:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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 75 [2022-02-16 14:05:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:43,348 INFO L225 Difference]: With dead ends: 454 [2022-02-16 14:05:43,348 INFO L226 Difference]: Without dead ends: 416 [2022-02-16 14:05:43,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:05:43,348 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 120 mSDsluCounter, 2213 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:43,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1817 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:05:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-16 14:05:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 326. [2022-02-16 14:05:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.3692307692307693) internal successors, (445), 325 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 445 transitions. [2022-02-16 14:05:43,353 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 445 transitions. Word has length 75 [2022-02-16 14:05:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:43,354 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 445 transitions. [2022-02-16 14:05:43,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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) [2022-02-16 14:05:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 445 transitions. [2022-02-16 14:05:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-16 14:05:43,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:43,355 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:43,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-16 14:05:43,577 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,SelfDestructingSolverStorable30 [2022-02-16 14:05:43,578 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:05:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1863215435, now seen corresponding path program 30 times [2022-02-16 14:05:43,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:43,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041419089] [2022-02-16 14:05:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:43,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:44,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:44,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041419089] [2022-02-16 14:05:44,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041419089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:44,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306197567] [2022-02-16 14:05:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:05:44,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:44,056 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) [2022-02-16 14:05:44,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 14:05:44,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-02-16 14:05:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:05:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:45,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:45,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306197567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:45,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:45,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2022-02-16 14:05:45,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5546883] [2022-02-16 14:05:45,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:45,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-16 14:05:45,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-16 14:05:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=6003, Unknown=0, NotChecked=0, Total=7310 [2022-02-16 14:05:45,744 INFO L87 Difference]: Start difference. First operand 326 states and 445 transitions. Second operand has 86 states, 86 states have (on average 2.13953488372093) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:03,666 INFO L93 Difference]: Finished difference Result 3040 states and 3773 transitions. [2022-02-16 14:06:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 446 states. [2022-02-16 14:06:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.13953488372093) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-02-16 14:06:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:03,674 INFO L225 Difference]: With dead ends: 3040 [2022-02-16 14:06:03,674 INFO L226 Difference]: Without dead ends: 2294 [2022-02-16 14:06:03,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124770 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=70204, Invalid=208052, Unknown=0, NotChecked=0, Total=278256 [2022-02-16 14:06:03,686 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 981 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:03,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 284 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-16 14:06:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-02-16 14:06:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 160. [2022-02-16 14:06:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3144654088050314) internal successors, (209), 159 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2022-02-16 14:06:03,696 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 77 [2022-02-16 14:06:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:03,697 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2022-02-16 14:06:03,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.13953488372093) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2022-02-16 14:06:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-16 14:06:03,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:03,697 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:03,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-16 14:06:03,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:03,911 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1008143053, now seen corresponding path program 31 times [2022-02-16 14:06:03,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:03,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360978025] [2022-02-16 14:06:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:03,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:04,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:04,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360978025] [2022-02-16 14:06:04,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360978025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:04,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593251087] [2022-02-16 14:06:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:04,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:04,186 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) [2022-02-16 14:06:04,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 14:06:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-16 14:06:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:04,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593251087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:04,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:04,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-02-16 14:06:04,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344717473] [2022-02-16 14:06:04,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:04,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:04,735 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2022-02-16 14:06:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:05,237 INFO L93 Difference]: Finished difference Result 483 states and 595 transitions. [2022-02-16 14:06:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:06:05,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 79 [2022-02-16 14:06:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:05,239 INFO L225 Difference]: With dead ends: 483 [2022-02-16 14:06:05,239 INFO L226 Difference]: Without dead ends: 443 [2022-02-16 14:06:05,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:05,239 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 128 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:05,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2049 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-16 14:06:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2022-02-16 14:06:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.369942196531792) internal successors, (474), 346 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 474 transitions. [2022-02-16 14:06:05,244 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 474 transitions. Word has length 79 [2022-02-16 14:06:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:05,244 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 474 transitions. [2022-02-16 14:06:05,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2022-02-16 14:06:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 474 transitions. [2022-02-16 14:06:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-16 14:06:05,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:05,245 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:05,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:05,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:05,459 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash -182764721, now seen corresponding path program 32 times [2022-02-16 14:06:05,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:05,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537025070] [2022-02-16 14:06:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:05,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:05,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:05,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537025070] [2022-02-16 14:06:05,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537025070] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:05,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752198252] [2022-02-16 14:06:05,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:05,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:05,998 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) [2022-02-16 14:06:06,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 14:06:06,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-16 14:06:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:07,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:07,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752198252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:07,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:07,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 90 [2022-02-16 14:06:07,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682602901] [2022-02-16 14:06:07,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:07,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-16 14:06:07,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-16 14:06:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=6734, Unknown=0, NotChecked=0, Total=8190 [2022-02-16 14:06:07,857 INFO L87 Difference]: Start difference. First operand 347 states and 474 transitions. Second operand has 91 states, 91 states have (on average 2.131868131868132) internal successors, (194), 90 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:29,111 INFO L93 Difference]: Finished difference Result 3386 states and 4200 transitions. [2022-02-16 14:06:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 499 states. [2022-02-16 14:06:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.131868131868132) internal successors, (194), 90 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-02-16 14:06:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:29,117 INFO L225 Difference]: With dead ends: 3386 [2022-02-16 14:06:29,117 INFO L226 Difference]: Without dead ends: 2549 [2022-02-16 14:06:29,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156724 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=86550, Invalid=256260, Unknown=0, NotChecked=0, Total=342810 [2022-02-16 14:06:29,127 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1046 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:29,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 305 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-16 14:06:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-02-16 14:06:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 169. [2022-02-16 14:06:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3154761904761905) internal successors, (221), 168 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2022-02-16 14:06:29,136 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 81 [2022-02-16 14:06:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:29,137 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2022-02-16 14:06:29,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.131868131868132) internal successors, (194), 90 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2022-02-16 14:06:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-16 14:06:29,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:29,137 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:29,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:29,342 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,SelfDestructingSolverStorable33 [2022-02-16 14:06:29,343 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1916234705, now seen corresponding path program 33 times [2022-02-16 14:06:29,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:29,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730056282] [2022-02-16 14:06:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:29,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:29,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:29,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730056282] [2022-02-16 14:06:29,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730056282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:29,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889645088] [2022-02-16 14:06:29,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:29,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:29,666 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) [2022-02-16 14:06:29,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 14:06:29,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-02-16 14:06:29,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2022-02-16 14:06:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:30,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:30,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889645088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:30,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:30,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-02-16 14:06:30,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986632375] [2022-02-16 14:06:30,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:30,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:06:30,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:06:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:30,297 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 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) [2022-02-16 14:06:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:30,849 INFO L93 Difference]: Finished difference Result 512 states and 631 transitions. [2022-02-16 14:06:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:06:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 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 83 [2022-02-16 14:06:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:30,850 INFO L225 Difference]: With dead ends: 512 [2022-02-16 14:06:30,850 INFO L226 Difference]: Without dead ends: 470 [2022-02-16 14:06:30,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:30,851 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 136 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:30,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2295 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-02-16 14:06:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2022-02-16 14:06:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.3705722070844686) internal successors, (503), 367 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 503 transitions. [2022-02-16 14:06:30,856 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 503 transitions. Word has length 83 [2022-02-16 14:06:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:30,856 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 503 transitions. [2022-02-16 14:06:30,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 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) [2022-02-16 14:06:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 503 transitions. [2022-02-16 14:06:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-16 14:06:30,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:30,857 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:30,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-16 14:06:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-16 14:06:31,057 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1261728941, now seen corresponding path program 34 times [2022-02-16 14:06:31,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:31,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979140210] [2022-02-16 14:06:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:31,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:31,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:31,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979140210] [2022-02-16 14:06:31,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979140210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:31,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022134268] [2022-02-16 14:06:31,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:31,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:31,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:31,693 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) [2022-02-16 14:06:31,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 14:06:31,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:31,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:31,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-16 14:06:31,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022134268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:33,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:33,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 95 [2022-02-16 14:06:33,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871467805] [2022-02-16 14:06:33,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:33,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-16 14:06:33,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-16 14:06:33,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=7507, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:06:33,717 INFO L87 Difference]: Start difference. First operand 368 states and 503 transitions. Second operand has 96 states, 96 states have (on average 2.125) internal successors, (204), 95 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) [2022-02-16 14:06:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:58,721 INFO L93 Difference]: Finished difference Result 3750 states and 4649 transitions. [2022-02-16 14:06:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-02-16 14:06:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.125) internal successors, (204), 95 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) Word has length 85 [2022-02-16 14:06:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:58,728 INFO L225 Difference]: With dead ends: 3750 [2022-02-16 14:06:58,728 INFO L226 Difference]: Without dead ends: 2817 [2022-02-16 14:06:58,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 645 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194515 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=105596, Invalid=312366, Unknown=0, NotChecked=0, Total=417962 [2022-02-16 14:06:58,748 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1015 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:58,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 368 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-16 14:06:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-02-16 14:06:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 178. [2022-02-16 14:06:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.3163841807909604) internal successors, (233), 177 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) [2022-02-16 14:06:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 233 transitions. [2022-02-16 14:06:58,758 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 233 transitions. Word has length 85 [2022-02-16 14:06:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:58,758 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 233 transitions. [2022-02-16 14:06:58,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.125) internal successors, (204), 95 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) [2022-02-16 14:06:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 233 transitions. [2022-02-16 14:06:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-16 14:06:58,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:58,759 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:58,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-16 14:06:58,970 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,SelfDestructingSolverStorable35 [2022-02-16 14:06:58,971 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:06:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash 118737621, now seen corresponding path program 35 times [2022-02-16 14:06:58,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:58,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921335884] [2022-02-16 14:06:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:58,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:59,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:59,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921335884] [2022-02-16 14:06:59,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921335884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:59,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797389920] [2022-02-16 14:06:59,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:59,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:59,306 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) [2022-02-16 14:06:59,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 14:06:59,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-02-16 14:06:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2022-02-16 14:06:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:59,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:00,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797389920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:00,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:00,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-02-16 14:07:00,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724589033] [2022-02-16 14:07:00,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:00,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:00,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:00,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:00,051 INFO L87 Difference]: Start difference. First operand 178 states and 233 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) 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) [2022-02-16 14:07:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:00,713 INFO L93 Difference]: Finished difference Result 541 states and 667 transitions. [2022-02-16 14:07:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:07:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) 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 87 [2022-02-16 14:07:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:00,714 INFO L225 Difference]: With dead ends: 541 [2022-02-16 14:07:00,714 INFO L226 Difference]: Without dead ends: 497 [2022-02-16 14:07:00,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:00,715 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 144 mSDsluCounter, 3140 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:00,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 2555 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:07:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-02-16 14:07:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 389. [2022-02-16 14:07:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.3711340206185567) internal successors, (532), 388 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 532 transitions. [2022-02-16 14:07:00,720 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 532 transitions. Word has length 87 [2022-02-16 14:07:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:00,720 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 532 transitions. [2022-02-16 14:07:00,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) 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) [2022-02-16 14:07:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 532 transitions. [2022-02-16 14:07:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-16 14:07:00,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:00,721 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:00,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:00,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:00,935 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:07:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1683465897, now seen corresponding path program 36 times [2022-02-16 14:07:00,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:00,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143328592] [2022-02-16 14:07:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:00,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:01,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:01,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143328592] [2022-02-16 14:07:01,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143328592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:01,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788976268] [2022-02-16 14:07:01,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:01,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:01,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:01,640 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) [2022-02-16 14:07:01,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 14:07:01,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-02-16 14:07:01,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:01,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 14:07:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:03,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:03,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788976268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:03,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:03,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2022-02-16 14:07:03,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284293432] [2022-02-16 14:07:03,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:03,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-16 14:07:03,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-16 14:07:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=8322, Unknown=0, NotChecked=0, Total=10100 [2022-02-16 14:07:03,782 INFO L87 Difference]: Start difference. First operand 389 states and 532 transitions. Second operand has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:33,082 INFO L93 Difference]: Finished difference Result 4132 states and 5120 transitions. [2022-02-16 14:07:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 614 states. [2022-02-16 14:07:33,083 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-02-16 14:07:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:33,091 INFO L225 Difference]: With dead ends: 4132 [2022-02-16 14:07:33,091 INFO L226 Difference]: Without dead ends: 3098 [2022-02-16 14:07:33,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 709 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238819 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=127624, Invalid=377186, Unknown=0, NotChecked=0, Total=504810 [2022-02-16 14:07:33,110 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1087 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 3218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:33,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 345 Invalid, 3218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-16 14:07:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-02-16 14:07:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 187. [2022-02-16 14:07:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.3172043010752688) internal successors, (245), 186 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 245 transitions. [2022-02-16 14:07:33,120 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 245 transitions. Word has length 89 [2022-02-16 14:07:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:33,120 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 245 transitions. [2022-02-16 14:07:33,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 245 transitions. [2022-02-16 14:07:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-16 14:07:33,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:33,121 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:33,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:33,322 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,SelfDestructingSolverStorable37 [2022-02-16 14:07:33,322 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:07:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1443551271, now seen corresponding path program 37 times [2022-02-16 14:07:33,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:33,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742042814] [2022-02-16 14:07:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:33,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:33,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:33,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742042814] [2022-02-16 14:07:33,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742042814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:33,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497442760] [2022-02-16 14:07:33,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:33,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:33,699 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) [2022-02-16 14:07:33,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 14:07:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2022-02-16 14:07:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:34,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:34,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497442760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:34,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:34,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-02-16 14:07:34,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450696038] [2022-02-16 14:07:34,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:34,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:07:34,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:07:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:07:34,342 INFO L87 Difference]: Start difference. First operand 187 states and 245 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:35,014 INFO L93 Difference]: Finished difference Result 570 states and 703 transitions. [2022-02-16 14:07:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:07:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-02-16 14:07:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:35,015 INFO L225 Difference]: With dead ends: 570 [2022-02-16 14:07:35,016 INFO L226 Difference]: Without dead ends: 524 [2022-02-16 14:07:35,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:07:35,016 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 152 mSDsluCounter, 3485 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:35,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 2829 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:07:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-16 14:07:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 410. [2022-02-16 14:07:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.371638141809291) internal successors, (561), 409 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 561 transitions. [2022-02-16 14:07:35,022 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 561 transitions. Word has length 91 [2022-02-16 14:07:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:35,022 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 561 transitions. [2022-02-16 14:07:35,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 561 transitions. [2022-02-16 14:07:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-16 14:07:35,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:35,023 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:35,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:35,245 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,SelfDestructingSolverStorable38 [2022-02-16 14:07:35,245 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:07:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:35,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1397054117, now seen corresponding path program 38 times [2022-02-16 14:07:35,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:35,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673104408] [2022-02-16 14:07:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:35,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:36,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:36,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673104408] [2022-02-16 14:07:36,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673104408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:36,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39387186] [2022-02-16 14:07:36,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:36,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:36,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:36,038 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) [2022-02-16 14:07:36,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 14:07:36,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-16 14:07:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:37,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:38,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39387186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:38,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:38,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 105 [2022-02-16 14:07:38,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808297030] [2022-02-16 14:07:38,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:38,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-16 14:07:38,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-16 14:07:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=9179, Unknown=0, NotChecked=0, Total=11130 [2022-02-16 14:07:38,314 INFO L87 Difference]: Start difference. First operand 410 states and 561 transitions. Second operand has 106 states, 106 states have (on average 2.1132075471698113) internal successors, (224), 105 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:12,510 INFO L93 Difference]: Finished difference Result 4532 states and 5613 transitions. [2022-02-16 14:08:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2022-02-16 14:08:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1132075471698113) internal successors, (224), 105 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-02-16 14:08:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:12,522 INFO L225 Difference]: With dead ends: 4532 [2022-02-16 14:08:12,522 INFO L226 Difference]: Without dead ends: 3392 [2022-02-16 14:08:12,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 776 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290352 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=152930, Invalid=451576, Unknown=0, NotChecked=0, Total=604506 [2022-02-16 14:08:12,548 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1200 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 3407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:12,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 415 Invalid, 3407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3019 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-16 14:08:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2022-02-16 14:08:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 196. [2022-02-16 14:08:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.317948717948718) internal successors, (257), 195 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 257 transitions. [2022-02-16 14:08:12,561 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 257 transitions. Word has length 93 [2022-02-16 14:08:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:12,562 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 257 transitions. [2022-02-16 14:08:12,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1132075471698113) internal successors, (224), 105 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 257 transitions. [2022-02-16 14:08:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-16 14:08:12,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:12,562 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:12,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:12,764 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,SelfDestructingSolverStorable39 [2022-02-16 14:08:12,765 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:08:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1079737635, now seen corresponding path program 39 times [2022-02-16 14:08:12,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:12,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605125359] [2022-02-16 14:08:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:12,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:13,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:13,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605125359] [2022-02-16 14:08:13,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605125359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:13,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367011805] [2022-02-16 14:08:13,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:13,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:13,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:13,168 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) [2022-02-16 14:08:13,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 14:08:13,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-02-16 14:08:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2022-02-16 14:08:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:13,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:13,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367011805] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:13,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:13,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-02-16 14:08:13,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246212581] [2022-02-16 14:08:13,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:13,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:08:13,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:08:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:08:13,849 INFO L87 Difference]: Start difference. First operand 196 states and 257 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 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) [2022-02-16 14:08:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:14,606 INFO L93 Difference]: Finished difference Result 599 states and 739 transitions. [2022-02-16 14:08:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:08:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 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 95 [2022-02-16 14:08:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:14,608 INFO L225 Difference]: With dead ends: 599 [2022-02-16 14:08:14,608 INFO L226 Difference]: Without dead ends: 551 [2022-02-16 14:08:14,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:08:14,608 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 160 mSDsluCounter, 3848 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:14,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 3117 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:08:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-16 14:08:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 431. [2022-02-16 14:08:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.372093023255814) internal successors, (590), 430 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 590 transitions. [2022-02-16 14:08:14,615 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 590 transitions. Word has length 95 [2022-02-16 14:08:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:14,615 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 590 transitions. [2022-02-16 14:08:14,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 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) [2022-02-16 14:08:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 590 transitions. [2022-02-16 14:08:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-16 14:08:14,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:14,616 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:14,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:14,827 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,SelfDestructingSolverStorable40 [2022-02-16 14:08:14,827 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:08:14,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1064603809, now seen corresponding path program 40 times [2022-02-16 14:08:14,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:14,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20555013] [2022-02-16 14:08:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:14,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:15,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:15,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20555013] [2022-02-16 14:08:15,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20555013] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:15,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730615989] [2022-02-16 14:08:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:15,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:15,588 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) [2022-02-16 14:08:15,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 14:08:15,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 14:08:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:18,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730615989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:18,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:18,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 110 [2022-02-16 14:08:18,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972115858] [2022-02-16 14:08:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:18,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-16 14:08:18,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-16 14:08:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2132, Invalid=10078, Unknown=0, NotChecked=0, Total=12210 [2022-02-16 14:08:18,064 INFO L87 Difference]: Start difference. First operand 431 states and 590 transitions. Second operand has 111 states, 111 states have (on average 2.108108108108108) internal successors, (234), 110 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) [2022-02-16 14:08:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:58,131 INFO L93 Difference]: Finished difference Result 4950 states and 6128 transitions. [2022-02-16 14:08:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 741 states. [2022-02-16 14:08:58,131 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.108108108108108) internal successors, (234), 110 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) Word has length 97 [2022-02-16 14:08:58,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:58,136 INFO L225 Difference]: With dead ends: 4950 [2022-02-16 14:08:58,136 INFO L226 Difference]: Without dead ends: 3699 [2022-02-16 14:08:58,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 846 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349865 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=181824, Invalid=536432, Unknown=0, NotChecked=0, Total=718256 [2022-02-16 14:08:58,169 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1352 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 3303 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:58,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1352 Valid, 405 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3303 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-16 14:08:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2022-02-16 14:08:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 205. [2022-02-16 14:08:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.3186274509803921) internal successors, (269), 204 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2022-02-16 14:08:58,181 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 97 [2022-02-16 14:08:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:58,181 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2022-02-16 14:08:58,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.108108108108108) internal successors, (234), 110 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) [2022-02-16 14:08:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2022-02-16 14:08:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-16 14:08:58,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:58,182 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:58,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:58,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:58,383 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:08:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash 577428449, now seen corresponding path program 41 times [2022-02-16 14:08:58,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:58,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612036228] [2022-02-16 14:08:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:58,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:58,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:58,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612036228] [2022-02-16 14:08:58,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612036228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:58,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843450092] [2022-02-16 14:08:58,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:58,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:58,842 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) [2022-02-16 14:08:58,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 14:08:58,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-02-16 14:08:58,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2022-02-16 14:08:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:59,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:59,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843450092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:59,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:59,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-02-16 14:08:59,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601110979] [2022-02-16 14:08:59,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:59,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:08:59,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:59,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:08:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:08:59,575 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:00,402 INFO L93 Difference]: Finished difference Result 628 states and 775 transitions. [2022-02-16 14:09:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:09:00,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-02-16 14:09:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:00,403 INFO L225 Difference]: With dead ends: 628 [2022-02-16 14:09:00,403 INFO L226 Difference]: Without dead ends: 578 [2022-02-16 14:09:00,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:09:00,404 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 168 mSDsluCounter, 4229 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:00,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 3419 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:09:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-02-16 14:09:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 452. [2022-02-16 14:09:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.3725055432372506) internal successors, (619), 451 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 619 transitions. [2022-02-16 14:09:00,410 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 619 transitions. Word has length 99 [2022-02-16 14:09:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:00,410 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 619 transitions. [2022-02-16 14:09:00,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 619 transitions. [2022-02-16 14:09:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-16 14:09:00,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:00,411 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:00,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:00,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:00,627 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:09:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1159968611, now seen corresponding path program 42 times [2022-02-16 14:09:00,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:00,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809513355] [2022-02-16 14:09:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:00,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:01,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:01,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809513355] [2022-02-16 14:09:01,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809513355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:01,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917857029] [2022-02-16 14:09:01,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:09:01,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:01,406 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) [2022-02-16 14:09:01,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 14:09:01,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-02-16 14:09:01,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-16 14:09:01,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:03,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:04,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917857029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:04,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:04,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2022-02-16 14:09:04,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961747063] [2022-02-16 14:09:04,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:04,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-16 14:09:04,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-16 14:09:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=11019, Unknown=0, NotChecked=0, Total=13340 [2022-02-16 14:09:04,113 INFO L87 Difference]: Start difference. First operand 452 states and 619 transitions. Second operand has 116 states, 116 states have (on average 2.103448275862069) internal successors, (244), 115 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:50,566 INFO L93 Difference]: Finished difference Result 5386 states and 6665 transitions. [2022-02-16 14:09:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 809 states. [2022-02-16 14:09:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.103448275862069) internal successors, (244), 115 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-02-16 14:09:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:50,573 INFO L225 Difference]: With dead ends: 5386 [2022-02-16 14:09:50,574 INFO L226 Difference]: Without dead ends: 4019 [2022-02-16 14:09:50,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 919 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418149 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=214630, Invalid=632690, Unknown=0, NotChecked=0, Total=847320 [2022-02-16 14:09:50,606 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1410 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 3869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:50,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 444 Invalid, 3869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-16 14:09:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-02-16 14:09:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 214. [2022-02-16 14:09:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.3192488262910798) internal successors, (281), 213 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 281 transitions. [2022-02-16 14:09:50,621 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 281 transitions. Word has length 101 [2022-02-16 14:09:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:50,621 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 281 transitions. [2022-02-16 14:09:50,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.103448275862069) internal successors, (244), 115 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 281 transitions. [2022-02-16 14:09:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-16 14:09:50,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:50,622 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:50,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:50,845 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,SelfDestructingSolverStorable43 [2022-02-16 14:09:50,845 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:09:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:50,845 INFO L85 PathProgramCache]: Analyzing trace with hash -502189339, now seen corresponding path program 43 times [2022-02-16 14:09:50,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:50,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565879905] [2022-02-16 14:09:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:50,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:51,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:51,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565879905] [2022-02-16 14:09:51,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565879905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:51,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514453073] [2022-02-16 14:09:51,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:09:51,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:51,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:51,276 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) [2022-02-16 14:09:51,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 14:09:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2022-02-16 14:09:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:51,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:51,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514453073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:51,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:51,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-02-16 14:09:51,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449566945] [2022-02-16 14:09:51,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:51,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:09:51,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:09:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:09:51,989 INFO L87 Difference]: Start difference. First operand 214 states and 281 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:52,878 INFO L93 Difference]: Finished difference Result 657 states and 811 transitions. [2022-02-16 14:09:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:09:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-02-16 14:09:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:52,880 INFO L225 Difference]: With dead ends: 657 [2022-02-16 14:09:52,880 INFO L226 Difference]: Without dead ends: 605 [2022-02-16 14:09:52,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:09:52,881 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 176 mSDsluCounter, 4628 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 3735 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:52,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 3735 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 14:09:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-16 14:09:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 473. [2022-02-16 14:09:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.3728813559322033) internal successors, (648), 472 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 648 transitions. [2022-02-16 14:09:52,886 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 648 transitions. Word has length 103 [2022-02-16 14:09:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:52,887 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 648 transitions. [2022-02-16 14:09:52,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 648 transitions. [2022-02-16 14:09:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-16 14:09:52,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:52,888 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:52,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:53,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-16 14:09:53,111 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:09:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash -32735897, now seen corresponding path program 44 times [2022-02-16 14:09:53,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:53,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314609151] [2022-02-16 14:09:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:53,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:54,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:54,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314609151] [2022-02-16 14:09:54,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314609151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:54,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074304823] [2022-02-16 14:09:54,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:09:54,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:54,069 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) [2022-02-16 14:09:54,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 14:09:54,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:09:54,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-16 14:09:54,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:55,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:56,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074304823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:56,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:56,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 120 [2022-02-16 14:09:56,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606593761] [2022-02-16 14:09:56,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:56,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-16 14:09:56,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-16 14:09:56,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=12002, Unknown=0, NotChecked=0, Total=14520 [2022-02-16 14:09:56,997 INFO L87 Difference]: Start difference. First operand 473 states and 648 transitions. Second operand has 121 states, 121 states have (on average 2.0991735537190084) internal successors, (254), 120 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:51,317 INFO L93 Difference]: Finished difference Result 5840 states and 7224 transitions. [2022-02-16 14:10:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 880 states. [2022-02-16 14:10:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0991735537190084) internal successors, (254), 120 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-02-16 14:10:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:51,326 INFO L225 Difference]: With dead ends: 5840 [2022-02-16 14:10:51,326 INFO L226 Difference]: Without dead ends: 4352 [2022-02-16 14:10:51,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 995 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496030 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=251686, Invalid=741326, Unknown=0, NotChecked=0, Total=993012 [2022-02-16 14:10:51,387 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1239 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3873 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 3873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:51,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 451 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 3873 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-16 14:10:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2022-02-16 14:10:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 223. [2022-02-16 14:10:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.3198198198198199) internal successors, (293), 222 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 293 transitions. [2022-02-16 14:10:51,409 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 293 transitions. Word has length 105 [2022-02-16 14:10:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 293 transitions. [2022-02-16 14:10:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0991735537190084) internal successors, (254), 120 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 293 transitions. [2022-02-16 14:10:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-16 14:10:51,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:51,410 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:51,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:51,623 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,SelfDestructingSolverStorable45 [2022-02-16 14:10:51,623 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:10:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 65046505, now seen corresponding path program 45 times [2022-02-16 14:10:51,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:51,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817239826] [2022-02-16 14:10:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:51,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:52,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:52,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817239826] [2022-02-16 14:10:52,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817239826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:52,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865167309] [2022-02-16 14:10:52,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:10:52,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:52,135 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) [2022-02-16 14:10:52,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 14:10:52,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-02-16 14:10:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2022-02-16 14:10:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:52,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:52,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865167309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:52,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:52,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-02-16 14:10:52,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321407404] [2022-02-16 14:10:52,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:52,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:10:52,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:10:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:10:52,891 INFO L87 Difference]: Start difference. First operand 223 states and 293 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:53,864 INFO L93 Difference]: Finished difference Result 686 states and 847 transitions. [2022-02-16 14:10:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:10:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-02-16 14:10:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:53,867 INFO L225 Difference]: With dead ends: 686 [2022-02-16 14:10:53,868 INFO L226 Difference]: Without dead ends: 632 [2022-02-16 14:10:53,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 234 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:10:53,868 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 184 mSDsluCounter, 5045 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 4065 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:53,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 4065 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 14:10:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-16 14:10:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 494. [2022-02-16 14:10:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.3732251521298176) internal successors, (677), 493 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 677 transitions. [2022-02-16 14:10:53,876 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 677 transitions. Word has length 107 [2022-02-16 14:10:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:53,876 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 677 transitions. [2022-02-16 14:10:53,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 677 transitions. [2022-02-16 14:10:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-16 14:10:53,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:53,877 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:53,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:54,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:54,102 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:10:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1001471637, now seen corresponding path program 46 times [2022-02-16 14:10:54,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:54,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222113432] [2022-02-16 14:10:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:54,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:55,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:55,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222113432] [2022-02-16 14:10:55,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222113432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:55,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740348802] [2022-02-16 14:10:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:10:55,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:55,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:55,027 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) [2022-02-16 14:10:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 14:10:55,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:10:55,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-16 14:10:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:57,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:58,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740348802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:58,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:58,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 125 [2022-02-16 14:10:58,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187129006] [2022-02-16 14:10:58,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:58,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-16 14:10:58,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-16 14:10:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2723, Invalid=13027, Unknown=0, NotChecked=0, Total=15750 [2022-02-16 14:10:58,293 INFO L87 Difference]: Start difference. First operand 494 states and 677 transitions. Second operand has 126 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 125 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:00,991 INFO L93 Difference]: Finished difference Result 6312 states and 7805 transitions. [2022-02-16 14:12:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 954 states. [2022-02-16 14:12:00,992 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 125 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-02-16 14:12:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:00,998 INFO L225 Difference]: With dead ends: 6312 [2022-02-16 14:12:00,999 INFO L226 Difference]: Without dead ends: 4698 [2022-02-16 14:12:01,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1218 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 1074 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584374 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=293344, Invalid=863356, Unknown=0, NotChecked=0, Total=1156700 [2022-02-16 14:12:01,073 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1596 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 4172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:01,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 478 Invalid, 4172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 3681 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-16 14:12:01,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2022-02-16 14:12:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 232. [2022-02-16 14:12:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3203463203463204) internal successors, (305), 231 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 305 transitions. [2022-02-16 14:12:01,095 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 305 transitions. Word has length 109 [2022-02-16 14:12:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:01,095 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 305 transitions. [2022-02-16 14:12:01,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 125 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 305 transitions. [2022-02-16 14:12:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-16 14:12:01,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:01,096 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:01,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 14:12:01,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-16 14:12:01,311 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:12:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1117903597, now seen corresponding path program 47 times [2022-02-16 14:12:01,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:01,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028232322] [2022-02-16 14:12:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:01,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:01,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:01,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028232322] [2022-02-16 14:12:01,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028232322] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:01,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337174760] [2022-02-16 14:12:01,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:12:01,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:01,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:01,816 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) [2022-02-16 14:12:01,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 14:12:01,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-02-16 14:12:01,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:12:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 99 conjunts are in the unsatisfiable core [2022-02-16 14:12:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:02,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337174760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:02,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:02,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 27 [2022-02-16 14:12:02,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251253543] [2022-02-16 14:12:02,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:02,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:12:02,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:12:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:12:02,762 INFO L87 Difference]: Start difference. First operand 232 states and 305 transitions. Second operand has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:03,829 INFO L93 Difference]: Finished difference Result 715 states and 883 transitions. [2022-02-16 14:12:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:12:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-02-16 14:12:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:03,830 INFO L225 Difference]: With dead ends: 715 [2022-02-16 14:12:03,830 INFO L226 Difference]: Without dead ends: 659 [2022-02-16 14:12:03,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:12:03,831 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 192 mSDsluCounter, 5480 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 4409 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:03,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 4409 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 14:12:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-16 14:12:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 515. [2022-02-16 14:12:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3735408560311284) internal successors, (706), 514 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 706 transitions. [2022-02-16 14:12:03,838 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 706 transitions. Word has length 111 [2022-02-16 14:12:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:03,838 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 706 transitions. [2022-02-16 14:12:03,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 706 transitions. [2022-02-16 14:12:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-16 14:12:03,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:03,839 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:03,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-16 14:12:04,043 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,SelfDestructingSolverStorable48 [2022-02-16 14:12:04,044 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:12:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1181975407, now seen corresponding path program 48 times [2022-02-16 14:12:04,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:04,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588081425] [2022-02-16 14:12:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:04,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:05,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:05,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588081425] [2022-02-16 14:12:05,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588081425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:05,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9365294] [2022-02-16 14:12:05,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:12:05,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:05,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:05,052 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) [2022-02-16 14:12:05,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 14:12:05,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-02-16 14:12:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:12:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 14:12:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:07,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:08,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9365294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:08,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:08,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 130 [2022-02-16 14:12:08,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002945074] [2022-02-16 14:12:08,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:08,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-16 14:12:08,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-16 14:12:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2936, Invalid=14094, Unknown=0, NotChecked=0, Total=17030 [2022-02-16 14:12:08,361 INFO L87 Difference]: Start difference. First operand 515 states and 706 transitions. Second operand has 131 states, 131 states have (on average 2.0916030534351147) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:20,865 INFO L93 Difference]: Finished difference Result 6802 states and 8408 transitions. [2022-02-16 14:13:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1031 states. [2022-02-16 14:13:20,866 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0916030534351147) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-02-16 14:13:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:13:20,871 INFO L225 Difference]: With dead ends: 6802 [2022-02-16 14:13:20,871 INFO L226 Difference]: Without dead ends: 5057 [2022-02-16 14:13:20,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1305 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 1156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684082 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=339970, Invalid=999836, Unknown=0, NotChecked=0, Total=1339806 [2022-02-16 14:13:20,931 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1726 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 4057 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 4057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:13:20,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 475 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 4057 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-16 14:13:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5057 states. [2022-02-16 14:13:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5057 to 241. [2022-02-16 14:13:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.3208333333333333) internal successors, (317), 240 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 317 transitions. [2022-02-16 14:13:20,950 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 317 transitions. Word has length 113 [2022-02-16 14:13:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 317 transitions. [2022-02-16 14:13:20,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0916030534351147) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 317 transitions. [2022-02-16 14:13:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-16 14:13:20,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:20,951 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:20,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 14:13:21,161 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,SelfDestructingSolverStorable49 [2022-02-16 14:13:21,162 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:13:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:21,162 INFO L85 PathProgramCache]: Analyzing trace with hash -828494863, now seen corresponding path program 49 times [2022-02-16 14:13:21,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:21,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208003477] [2022-02-16 14:13:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:21,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:21,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:21,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208003477] [2022-02-16 14:13:21,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208003477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:21,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917313734] [2022-02-16 14:13:21,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:13:21,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:21,664 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) [2022-02-16 14:13:21,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 14:13:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:21,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 103 conjunts are in the unsatisfiable core [2022-02-16 14:13:21,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:22,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:22,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917313734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:22,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:22,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 28 [2022-02-16 14:13:22,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329622802] [2022-02-16 14:13:22,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:13:22,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:13:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:13:22,566 INFO L87 Difference]: Start difference. First operand 241 states and 317 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 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) [2022-02-16 14:13:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:23,715 INFO L93 Difference]: Finished difference Result 744 states and 919 transitions. [2022-02-16 14:13:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:13:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 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 115 [2022-02-16 14:13:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:13:23,716 INFO L225 Difference]: With dead ends: 744 [2022-02-16 14:13:23,716 INFO L226 Difference]: Without dead ends: 686 [2022-02-16 14:13:23,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:13:23,717 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 200 mSDsluCounter, 5933 mSDsCounter, 0 mSdLazyCounter, 3459 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 4767 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:13:23,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 4767 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3459 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-16 14:13:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-16 14:13:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 536. [2022-02-16 14:13:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.3738317757009346) internal successors, (735), 535 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 735 transitions. [2022-02-16 14:13:23,724 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 735 transitions. Word has length 115 [2022-02-16 14:13:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:23,724 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 735 transitions. [2022-02-16 14:13:23,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 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) [2022-02-16 14:13:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 735 transitions. [2022-02-16 14:13:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-16 14:13:23,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:23,725 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:23,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-16 14:13:23,939 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,SelfDestructingSolverStorable50 [2022-02-16 14:13:23,939 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:13:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:23,940 INFO L85 PathProgramCache]: Analyzing trace with hash -930888845, now seen corresponding path program 50 times [2022-02-16 14:13:23,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:23,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340787032] [2022-02-16 14:13:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:23,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:25,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:25,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340787032] [2022-02-16 14:13:25,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340787032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:25,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774340886] [2022-02-16 14:13:25,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:13:25,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:25,059 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) [2022-02-16 14:13:25,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 14:13:25,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:13:25,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:13:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-16 14:13:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:27,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:28,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774340886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:28,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:28,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 135 [2022-02-16 14:13:28,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840611274] [2022-02-16 14:13:28,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:28,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-16 14:13:28,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-16 14:13:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3157, Invalid=15203, Unknown=0, NotChecked=0, Total=18360 [2022-02-16 14:13:28,746 INFO L87 Difference]: Start difference. First operand 536 states and 735 transitions. Second operand has 136 states, 136 states have (on average 2.088235294117647) internal successors, (284), 135 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:14:50,623 INFO L93 Difference]: Finished difference Result 7310 states and 9033 transitions. [2022-02-16 14:14:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1111 states. [2022-02-16 14:14:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.088235294117647) internal successors, (284), 135 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-02-16 14:14:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:14:50,630 INFO L225 Difference]: With dead ends: 7310 [2022-02-16 14:14:50,630 INFO L226 Difference]: Without dead ends: 5429 [2022-02-16 14:14:50,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 1241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796095 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=391944, Invalid=1151862, Unknown=0, NotChecked=0, Total=1543806 [2022-02-16 14:14:50,706 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1615 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 4716 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 4716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:14:50,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 545 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 4716 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-16 14:14:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2022-02-16 14:14:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 250. [2022-02-16 14:14:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.321285140562249) internal successors, (329), 249 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 329 transitions. [2022-02-16 14:14:50,728 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 329 transitions. Word has length 117 [2022-02-16 14:14:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:14:50,728 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 329 transitions. [2022-02-16 14:14:50,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.088235294117647) internal successors, (284), 135 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 329 transitions. [2022-02-16 14:14:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-16 14:14:50,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:14:50,729 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:14:50,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-16 14:14:50,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:50,938 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:14:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:14:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash 228489973, now seen corresponding path program 51 times [2022-02-16 14:14:50,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:14:50,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134633059] [2022-02-16 14:14:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:14:50,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:14:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:14:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:51,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:14:51,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134633059] [2022-02-16 14:14:51,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134633059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:14:51,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651525637] [2022-02-16 14:14:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:14:51,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:14:51,456 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) [2022-02-16 14:14:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 14:14:51,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-02-16 14:14:51,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:14:51,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 107 conjunts are in the unsatisfiable core [2022-02-16 14:14:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:14:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:51,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:14:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:52,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651525637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:14:52,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:14:52,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 29 [2022-02-16 14:14:52,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247624715] [2022-02-16 14:14:52,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:14:52,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:14:52,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:14:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:14:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:14:52,296 INFO L87 Difference]: Start difference. First operand 250 states and 329 transitions. Second operand has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:14:53,504 INFO L93 Difference]: Finished difference Result 773 states and 955 transitions. [2022-02-16 14:14:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:14:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-02-16 14:14:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:14:53,505 INFO L225 Difference]: With dead ends: 773 [2022-02-16 14:14:53,505 INFO L226 Difference]: Without dead ends: 713 [2022-02-16 14:14:53,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:14:53,506 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 208 mSDsluCounter, 6404 mSDsCounter, 0 mSdLazyCounter, 3727 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 5139 SdHoareTripleChecker+Invalid, 3728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:14:53,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 5139 Invalid, 3728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3727 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-16 14:14:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-02-16 14:14:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 557. [2022-02-16 14:14:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.3741007194244603) internal successors, (764), 556 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 764 transitions. [2022-02-16 14:14:53,511 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 764 transitions. Word has length 119 [2022-02-16 14:14:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:14:53,511 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 764 transitions. [2022-02-16 14:14:53,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 764 transitions. [2022-02-16 14:14:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-16 14:14:53,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:14:53,512 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:14:53,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-16 14:14:53,715 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,SelfDestructingSolverStorable52 [2022-02-16 14:14:53,715 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:14:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:14:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -469204617, now seen corresponding path program 52 times [2022-02-16 14:14:53,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:14:53,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41062813] [2022-02-16 14:14:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:14:53,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:14:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:14:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:54,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:14:54,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41062813] [2022-02-16 14:14:54,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41062813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:14:54,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136514462] [2022-02-16 14:14:54,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:14:54,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:54,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:14:54,823 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) [2022-02-16 14:14:54,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 14:14:54,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:14:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:14:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 14:14:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:14:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:14:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:58,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136514462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:14:58,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:14:58,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 140 [2022-02-16 14:14:58,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107026748] [2022-02-16 14:14:58,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:14:58,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-02-16 14:14:58,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:14:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-02-16 14:14:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3386, Invalid=16354, Unknown=0, NotChecked=0, Total=19740 [2022-02-16 14:14:58,693 INFO L87 Difference]: Start difference. First operand 557 states and 764 transitions. Second operand has 141 states, 141 states have (on average 2.0851063829787235) internal successors, (294), 140 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-16 14:15:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 838 states. [2022-02-16 14:15:53,128 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 [2022-02-16 14:15:53,128 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:15:53,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 973 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482017 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=261153, Invalid=688497, Unknown=0, NotChecked=0, Total=949650 [2022-02-16 14:15:53,155 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1758 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:15:53,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1758 Valid, 371 Invalid, 4591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-16 14:15:53,156 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 14:15:53,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-16 14:15:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:15:53,361 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (557states) and FLOYD_HOARE automaton (currently 838 states, 141 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 975 known predicates. [2022-02-16 14:15:53,362 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 14:15:53,362 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 14:15:53,363 INFO L732 BasicCegarLoop]: Path program histogram: [52, 1, 1] [2022-02-16 14:15:53,365 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 14:15:53,365 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 14:15:53,367 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:15:53 BasicIcfg [2022-02-16 14:15:53,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 14:15:53,367 INFO L158 Benchmark]: Toolchain (without parser) took 716686.94ms. Allocated memory was 180.4MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 139.8MB in the beginning and 870.6MB in the end (delta: -730.8MB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-02-16 14:15:53,368 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.18ms. Allocated memory is still 180.4MB. Free memory is still 140.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 14:15:53,368 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.50ms. Allocated memory is still 180.4MB. Free memory was 139.7MB in the beginning and 138.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-16 14:15:53,368 INFO L158 Benchmark]: Boogie Preprocessor took 17.01ms. Allocated memory is still 180.4MB. Free memory was 138.2MB in the beginning and 137.3MB in the end (delta: 936.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:15:53,368 INFO L158 Benchmark]: RCFGBuilder took 193.84ms. Allocated memory is still 180.4MB. Free memory was 137.3MB in the beginning and 128.4MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-16 14:15:53,368 INFO L158 Benchmark]: TraceAbstraction took 716444.48ms. Allocated memory was 180.4MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 127.9MB in the beginning and 870.6MB in the end (delta: -742.7MB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-02-16 14:15:53,369 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 0.18ms. Allocated memory is still 180.4MB. Free memory is still 140.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.50ms. Allocated memory is still 180.4MB. Free memory was 139.7MB in the beginning and 138.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.01ms. Allocated memory is still 180.4MB. Free memory was 138.2MB in the beginning and 137.3MB in the end (delta: 936.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 193.84ms. Allocated memory is still 180.4MB. Free memory was 137.3MB in the beginning and 128.4MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 716444.48ms. Allocated memory was 180.4MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 127.9MB in the beginning and 870.6MB in the end (delta: -742.7MB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (557states) and FLOYD_HOARE automaton (currently 838 states, 141 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 975 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (557states) and FLOYD_HOARE automaton (currently 838 states, 141 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 975 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (557states) and FLOYD_HOARE automaton (currently 838 states, 141 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 975 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 716.4s, OverallIterations: 54, TraceHistogramMax: 27, PathProgramHistogramMax: 52, EmptinessCheckTime: 0.0s, AutomataDifference: 624.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25793 SdHoareTripleChecker+Valid, 44.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25793 mSDsluCounter, 56395 SdHoareTripleChecker+Invalid, 37.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 69018 mSDsCounter, 7238 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 89183 IncrementalHoareTripleChecker+Invalid, 96421 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7238 mSolverCounterUnsat, 3104 mSDtfsCounter, 89183 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20270 GetRequests, 6374 SyntacticMatches, 105 SemanticMatches, 13790 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5185218 ImplicationChecksByTransitivity, 508.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=557occurred in iteration=53, InterpolantAutomatonStates: 11115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 53 MinimizatonAttempts, 52688 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 76.1s InterpolantComputationTime, 7329 NumberOfCodeBlocks, 7329 NumberOfCodeBlocksAsserted, 466 NumberOfCheckSat, 10826 ConstructedInterpolants, 0 QuantifiedInterpolants, 94516 SizeOfPredicates, 215 NumberOfNonLiveVariables, 9394 ConjunctsInSsa, 2319 ConjunctsInUnsatCore, 160 InterpolantComputations, 2 PerfectInterpolantSequences, 19332/76599 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