/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:09:12,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:09:12,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:09:12,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 07:09:12,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:09:12,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:09:12,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:09:12,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 07:09:12,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:09:12,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:09:12,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 07:09:12,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 07:09:12,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 07:09:12,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 07:09:12,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 07:09:12,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 07:09:12,737 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 07:09:12,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:09:12,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:09:12,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:09:12,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:09:12,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:09:12,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:09:12,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:09:12,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:09:12,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:09:12,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:09:12,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:09:12,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:09:12,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:09:12,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:09:12,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:09:12,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:09:12,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:09:12,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 07:09:12,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 07:09:12,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:09:12,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 07:09:12,741 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 07:09:12,741 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 07:09:12,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 07:09:12,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:09:12,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:09:12,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:09:13,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:09:13,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:09:13,001 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:09:13,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2022-01-31 07:09:13,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f6d9715/8a804510e0cc48b3af2657bcd1ca151a/FLAGdb009658f [2022-01-31 07:09:13,488 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:09:13,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2022-01-31 07:09:13,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f6d9715/8a804510e0cc48b3af2657bcd1ca151a/FLAGdb009658f [2022-01-31 07:09:13,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f6d9715/8a804510e0cc48b3af2657bcd1ca151a [2022-01-31 07:09:13,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:09:13,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 07:09:13,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:09:13,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:09:13,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:09:13,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d73b3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13, skipping insertion in model container [2022-01-31 07:09:13,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:09:13,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:09:13,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2022-01-31 07:09:13,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:09:13,776 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:09:13,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] [2022-01-31 07:09:13,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:09:13,828 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:09:13,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13 WrapperNode [2022-01-31 07:09:13,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:09:13,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:09:13,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:09:13,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:09:13,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:09:13,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:09:13,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:09:13,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:09:13,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (1/1) ... [2022-01-31 07:09:13,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:09:13,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:13,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 07:09:13,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 07:09:13,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:09:13,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:09:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:09:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 07:09:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:09:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:09:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:09:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:09:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:09:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:09:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:09:13,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:09:13,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:09:14,035 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:09:14,037 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:09:14,231 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:09:14,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:09:14,238 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 07:09:14,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:09:14 BoogieIcfgContainer [2022-01-31 07:09:14,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:09:14,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:09:14,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:09:14,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:09:14,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:09:13" (1/3) ... [2022-01-31 07:09:14,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ed7651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:09:14, skipping insertion in model container [2022-01-31 07:09:14,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:13" (2/3) ... [2022-01-31 07:09:14,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ed7651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:09:14, skipping insertion in model container [2022-01-31 07:09:14,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:09:14" (3/3) ... [2022-01-31 07:09:14,247 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2022-01-31 07:09:14,251 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:09:14,251 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:09:14,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:09:14,305 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:09:14,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:09:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:09:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 07:09:14,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:14,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:14,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:14,331 INFO L85 PathProgramCache]: Analyzing trace with hash -242473645, now seen corresponding path program 1 times [2022-01-31 07:09:14,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:14,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563660950] [2022-01-31 07:09:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:14,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:14,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:14,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563660950] [2022-01-31 07:09:14,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563660950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:09:14,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:09:14,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:09:14,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267740412] [2022-01-31 07:09:14,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:09:14,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:09:14,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:09:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:09:14,640 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:14,718 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-01-31 07:09:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:09:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 07:09:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:14,730 INFO L225 Difference]: With dead ends: 40 [2022-01-31 07:09:14,730 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 07:09:14,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:09:14,739 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:14,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:09:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 07:09:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-01-31 07:09:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-31 07:09:14,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-01-31 07:09:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:14,770 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-31 07:09:14,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-31 07:09:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:09:14,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:14,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:14,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:09:14,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -355887846, now seen corresponding path program 1 times [2022-01-31 07:09:14,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:14,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062876420] [2022-01-31 07:09:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:14,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:14,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:14,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:14,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062876420] [2022-01-31 07:09:14,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062876420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:14,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100080193] [2022-01-31 07:09:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:14,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:14,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:14,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:09:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:09:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:15,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:09:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:15,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100080193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:09:15,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:09:15,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:09:15,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901832166] [2022-01-31 07:09:15,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:09:15,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:09:15,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:09:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:09:15,121 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:15,190 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-01-31 07:09:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:09:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:09:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:15,195 INFO L225 Difference]: With dead ends: 41 [2022-01-31 07:09:15,195 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 07:09:15,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:09:15,197 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:15,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 94 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:09:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 07:09:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 07:09:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-01-31 07:09:15,217 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 16 [2022-01-31 07:09:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:15,217 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-01-31 07:09:15,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-01-31 07:09:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 07:09:15,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:15,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:15,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 07:09:15,419 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 [2022-01-31 07:09:15,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1146781841, now seen corresponding path program 2 times [2022-01-31 07:09:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:15,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133741781] [2022-01-31 07:09:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:15,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:15,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 07:09:15,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133741781] [2022-01-31 07:09:15,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133741781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740775974] [2022-01-31 07:09:15,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:09:15,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:15,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:15,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:09:15,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 07:09:15,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:09:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:09:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 07:09:15,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:09:15,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740775974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:09:15,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:09:15,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-01-31 07:09:15,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362066004] [2022-01-31 07:09:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:09:15,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:09:15,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:09:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:09:15,780 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:15,793 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-01-31 07:09:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:09:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 07:09:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:15,795 INFO L225 Difference]: With dead ends: 38 [2022-01-31 07:09:15,795 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 07:09:15,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 07:09:15,796 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:15,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:09:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 07:09:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 07:09:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-01-31 07:09:15,804 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-01-31 07:09:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:15,805 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-01-31 07:09:15,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-01-31 07:09:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 07:09:15,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:15,806 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:15,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 07:09:16,019 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 [2022-01-31 07:09:16,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1131677804, now seen corresponding path program 1 times [2022-01-31 07:09:16,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:16,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278823340] [2022-01-31 07:09:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:16,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:16,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:16,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278823340] [2022-01-31 07:09:16,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278823340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460272620] [2022-01-31 07:09:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:16,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:16,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:16,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:16,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:09:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:09:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:16,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:09:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:16,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460272620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:09:16,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:09:16,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 07:09:16,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122340282] [2022-01-31 07:09:16,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:09:16,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 07:09:16,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 07:09:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:09:16,444 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:16,534 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2022-01-31 07:09:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:09:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 07:09:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:16,537 INFO L225 Difference]: With dead ends: 71 [2022-01-31 07:09:16,537 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 07:09:16,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:09:16,541 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 132 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:16,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:09:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 07:09:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 07:09:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2022-01-31 07:09:16,566 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 28 [2022-01-31 07:09:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:16,566 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2022-01-31 07:09:16,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2022-01-31 07:09:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 07:09:16,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:16,568 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:16,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:09:16,789 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 [2022-01-31 07:09:16,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash -861829698, now seen corresponding path program 2 times [2022-01-31 07:09:16,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:16,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775184106] [2022-01-31 07:09:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:16,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:16,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:16,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:16,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775184106] [2022-01-31 07:09:16,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775184106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:16,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854589797] [2022-01-31 07:09:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:09:16,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:16,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:16,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:09:17,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:09:17,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:09:17,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:09:17,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:09:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:17,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854589797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:09:17,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:09:17,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 07:09:17,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50788808] [2022-01-31 07:09:17,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:09:17,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 07:09:17,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 07:09:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:09:17,489 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:17,590 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2022-01-31 07:09:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 07:09:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 07:09:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:17,594 INFO L225 Difference]: With dead ends: 131 [2022-01-31 07:09:17,595 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 07:09:17,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:09:17,596 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 276 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:17,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 167 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:09:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 07:09:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-31 07:09:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 169 transitions. [2022-01-31 07:09:17,615 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 169 transitions. Word has length 52 [2022-01-31 07:09:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:17,615 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 169 transitions. [2022-01-31 07:09:17,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 169 transitions. [2022-01-31 07:09:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 07:09:17,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:17,617 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:17,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 07:09:17,817 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 [2022-01-31 07:09:17,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1704032238, now seen corresponding path program 3 times [2022-01-31 07:09:17,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162883617] [2022-01-31 07:09:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:17,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:18,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:18,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162883617] [2022-01-31 07:09:18,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162883617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671640567] [2022-01-31 07:09:18,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:09:18,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:18,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:18,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:09:18,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-31 07:09:18,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:09:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:09:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:18,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:09:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671640567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:09:19,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:09:19,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 07:09:19,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687615249] [2022-01-31 07:09:19,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:09:19,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 07:09:19,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 07:09:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:09:19,467 INFO L87 Difference]: Start difference. First operand 124 states and 169 transitions. Second operand has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:19,719 INFO L93 Difference]: Finished difference Result 251 states and 368 transitions. [2022-01-31 07:09:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 07:09:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 07:09:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:19,725 INFO L225 Difference]: With dead ends: 251 [2022-01-31 07:09:19,726 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 07:09:19,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:09:19,728 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 681 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:19,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 294 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:09:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 07:09:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-01-31 07:09:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.3916666666666666) internal successors, (334), 240 states have internal predecessors, (334), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2022-01-31 07:09:19,752 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 100 [2022-01-31 07:09:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2022-01-31 07:09:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.86) internal successors, (193), 49 states have internal predecessors, (193), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2022-01-31 07:09:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 07:09:19,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:19,755 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:19,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:09:19,972 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 [2022-01-31 07:09:19,973 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash 786965690, now seen corresponding path program 4 times [2022-01-31 07:09:19,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:19,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739429510] [2022-01-31 07:09:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:19,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:21,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:21,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:21,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739429510] [2022-01-31 07:09:21,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739429510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:21,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651265326] [2022-01-31 07:09:21,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:09:21,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:21,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:21,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 07:09:21,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:09:21,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:09:21,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 07:09:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:09:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:24,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651265326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:09:24,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:09:24,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 07:09:24,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667871643] [2022-01-31 07:09:24,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:09:24,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 07:09:24,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 07:09:24,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 07:09:24,548 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:25,620 INFO L93 Difference]: Finished difference Result 491 states and 728 transitions. [2022-01-31 07:09:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 07:09:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-01-31 07:09:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:25,623 INFO L225 Difference]: With dead ends: 491 [2022-01-31 07:09:25,623 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 07:09:25,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 07:09:25,626 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1845 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:25,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1845 Valid, 510 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:09:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 07:09:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2022-01-31 07:09:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.3958333333333333) internal successors, (670), 480 states have internal predecessors, (670), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 673 transitions. [2022-01-31 07:09:25,646 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 673 transitions. Word has length 196 [2022-01-31 07:09:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:25,646 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 673 transitions. [2022-01-31 07:09:25,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.9285714285714284) internal successors, (385), 97 states have internal predecessors, (385), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 673 transitions. [2022-01-31 07:09:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-01-31 07:09:25,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:25,652 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:25,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 07:09:25,867 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 [2022-01-31 07:09:25,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1578745354, now seen corresponding path program 5 times [2022-01-31 07:09:25,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007985473] [2022-01-31 07:09:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:25,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:29,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:09:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:09:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:09:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007985473] [2022-01-31 07:09:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007985473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:09:29,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234765666] [2022-01-31 07:09:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:09:29,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:09:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:09:29,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:09:29,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 07:09:30,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2022-01-31 07:09:30,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:09:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 3356 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-31 07:09:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:09:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:30,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:09:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:09:39,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234765666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:09:39,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:09:39,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-01-31 07:09:39,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996219993] [2022-01-31 07:09:39,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:09:39,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 07:09:39,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:09:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 07:09:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 07:09:39,424 INFO L87 Difference]: Start difference. First operand 484 states and 673 transitions. Second operand has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:09:48,212 INFO L93 Difference]: Finished difference Result 971 states and 1448 transitions. [2022-01-31 07:09:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 07:09:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 388 [2022-01-31 07:09:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:09:48,217 INFO L225 Difference]: With dead ends: 971 [2022-01-31 07:09:48,217 INFO L226 Difference]: Without dead ends: 964 [2022-01-31 07:09:48,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 07:09:48,220 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3258 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3258 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:09:48,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3258 Valid, 1038 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:09:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-01-31 07:09:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 964. [2022-01-31 07:09:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 960 states have (on average 1.3979166666666667) internal successors, (1342), 960 states have internal predecessors, (1342), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1345 transitions. [2022-01-31 07:09:48,249 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1345 transitions. Word has length 388 [2022-01-31 07:09:48,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:09:48,250 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1345 transitions. [2022-01-31 07:09:48,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.963917525773196) internal successors, (769), 193 states have internal predecessors, (769), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:09:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1345 transitions. [2022-01-31 07:09:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2022-01-31 07:09:48,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:09:48,271 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:09:48,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 07:09:48,488 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 [2022-01-31 07:09:48,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:09:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:09:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -344559446, now seen corresponding path program 6 times [2022-01-31 07:09:48,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:09:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613490700] [2022-01-31 07:09:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:09:48,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:09:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:10:00,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:10:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:10:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:10:00,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:10:00,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613490700] [2022-01-31 07:10:00,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613490700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:10:00,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886862517] [2022-01-31 07:10:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:10:00,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:10:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:10:00,320 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:10:00,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 07:10:02,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 191 check-sat command(s) [2022-01-31 07:10:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:10:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 6620 conjuncts, 192 conjunts are in the unsatisfiable core [2022-01-31 07:10:02,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:10:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:10:03,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:10:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 72010 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:10:37,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886862517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:10:37,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:10:37,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2022-01-31 07:10:37,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824184581] [2022-01-31 07:10:37,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:10:37,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-01-31 07:10:37,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:10:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-01-31 07:10:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-01-31 07:10:37,435 INFO L87 Difference]: Start difference. First operand 964 states and 1345 transitions. Second operand has 386 states, 386 states have (on average 3.981865284974093) internal successors, (1537), 385 states have internal predecessors, (1537), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:12:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:12:45,468 INFO L93 Difference]: Finished difference Result 1931 states and 2888 transitions. [2022-01-31 07:12:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-01-31 07:12:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 3.981865284974093) internal successors, (1537), 385 states have internal predecessors, (1537), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 772 [2022-01-31 07:12:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:12:45,477 INFO L225 Difference]: With dead ends: 1931 [2022-01-31 07:12:45,477 INFO L226 Difference]: Without dead ends: 1924 [2022-01-31 07:12:45,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1738 GetRequests, 1354 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-01-31 07:12:45,487 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7497 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7497 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:12:45,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7497 Valid, 1991 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 07:12:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-01-31 07:12:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1924. [2022-01-31 07:12:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1920 states have (on average 1.3989583333333333) internal successors, (2686), 1920 states have internal predecessors, (2686), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:12:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2689 transitions. [2022-01-31 07:12:45,543 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2689 transitions. Word has length 772 [2022-01-31 07:12:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:12:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 2689 transitions. [2022-01-31 07:12:45,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 3.981865284974093) internal successors, (1537), 385 states have internal predecessors, (1537), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:12:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2689 transitions. [2022-01-31 07:12:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1541 [2022-01-31 07:12:45,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:12:45,617 INFO L514 BasicCegarLoop]: trace histogram [382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:12:45,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 07:12:45,832 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 [2022-01-31 07:12:45,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:12:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:12:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1914033642, now seen corresponding path program 7 times [2022-01-31 07:12:45,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:12:45,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139709991] [2022-01-31 07:12:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:12:45,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:12:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:13:31,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:13:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:13:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:13:31,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:13:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139709991] [2022-01-31 07:13:31,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139709991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:13:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371885192] [2022-01-31 07:13:31,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:13:31,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:13:31,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:13:31,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:13:31,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 07:13:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:13:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 13148 conjuncts, 384 conjunts are in the unsatisfiable core [2022-01-31 07:13:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:13:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:13:36,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:15:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 291466 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:15:52,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371885192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:15:52,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:15:52,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [386, 385, 385] total 770 [2022-01-31 07:15:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863422815] [2022-01-31 07:15:52,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:15:52,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-01-31 07:15:52,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:15:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-01-31 07:15:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295298, Invalid=296832, Unknown=0, NotChecked=0, Total=592130 [2022-01-31 07:15:52,472 INFO L87 Difference]: Start difference. First operand 1924 states and 2689 transitions. Second operand has 770 states, 770 states have (on average 3.9909090909090907) internal successors, (3073), 769 states have internal predecessors, (3073), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)