/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:35:25,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:35:25,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:35:25,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:35:26,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:35:26,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:35:26,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:35:26,005 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 [2023-04-01 18:35:26,033 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:35:26,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:35:26,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:35:26,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:35:26,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:35:26,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:35:26,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:35:26,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:35:26,036 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:35:26,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:35:26,037 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:35:26,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:35:26,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:35:26,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:35:26,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:35:26,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:35:26,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:35:26,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:35:26,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:35:26,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:35:26,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:35:26,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:35:26,041 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:35:26,041 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:35:26,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:35:26,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:35:26,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:35:26,284 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:35:26,285 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:35:26,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-04-01 18:35:27,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:35:27,604 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:35:27,605 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-04-01 18:35:27,608 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da651375/8333ad337e0a46468f1cb25295511a01/FLAGdbf1775e2 [2023-04-01 18:35:27,621 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da651375/8333ad337e0a46468f1cb25295511a01 [2023-04-01 18:35:27,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:35:27,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:35:27,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:35:27,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:35:27,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:35:27,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2727602b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27, skipping insertion in model container [2023-04-01 18:35:27,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:35:27,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:35:27,758 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-04-01 18:35:27,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:35:27,769 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:35:27,781 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-04-01 18:35:27,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:35:27,793 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:35:27,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27 WrapperNode [2023-04-01 18:35:27,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:35:27,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:35:27,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:35:27,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:35:27,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,818 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:35:27,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:35:27,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:35:27,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:35:27,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (1/1) ... [2023-04-01 18:35:27,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:35:27,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:27,848 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) [2023-04-01 18:35:27,850 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 [2023-04-01 18:35:27,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:35:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:35:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:35:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:35:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:35:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:35:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:35:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:35:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:35:27,946 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:35:27,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:35:28,056 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:35:28,061 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:35:28,061 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 18:35:28,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:35:28 BoogieIcfgContainer [2023-04-01 18:35:28,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:35:28,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:35:28,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:35:28,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:35:28,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:35:27" (1/3) ... [2023-04-01 18:35:28,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346396a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:35:28, skipping insertion in model container [2023-04-01 18:35:28,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:27" (2/3) ... [2023-04-01 18:35:28,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346396a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:35:28, skipping insertion in model container [2023-04-01 18:35:28,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:35:28" (3/3) ... [2023-04-01 18:35:28,069 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-04-01 18:35:28,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:35:28,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:35:28,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:35:28,124 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a830202, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:35:28,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:35:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2023-04-01 18:35:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 18:35:28,134 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:28,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:28,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:28,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1754979163, now seen corresponding path program 1 times [2023-04-01 18:35:28,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:28,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95316984] [2023-04-01 18:35:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:28,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:35:28,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:28,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95316984] [2023-04-01 18:35:28,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95316984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:35:28,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:35:28,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:35:28,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342670980] [2023-04-01 18:35:28,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:35:28,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:35:28,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:35:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:35:28,433 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-04-01 18:35:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:28,543 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-04-01 18:35:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:35:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2023-04-01 18:35:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:28,552 INFO L225 Difference]: With dead ends: 34 [2023-04-01 18:35:28,552 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 18:35:28,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:35:28,557 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:28,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:35:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 18:35:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-04-01 18:35:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-04-01 18:35:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 18:35:28,589 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-04-01 18:35:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:28,589 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 18:35:28,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-04-01 18:35:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 18:35:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:35:28,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:28,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:28,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:35:28,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:28,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1376538279, now seen corresponding path program 1 times [2023-04-01 18:35:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:28,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788074917] [2023-04-01 18:35:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:28,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:35:28,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:28,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788074917] [2023-04-01 18:35:28,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788074917] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:28,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50919833] [2023-04-01 18:35:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:28,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:28,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:28,706 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) [2023-04-01 18:35:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:35:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:28,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:35:28,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:35:28,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:35:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50919833] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:28,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:35:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327374835] [2023-04-01 18:35:28,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:35:28,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:35:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:35:28,914 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-04-01 18:35:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:29,034 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-04-01 18:35:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:35:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 15 [2023-04-01 18:35:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:29,036 INFO L225 Difference]: With dead ends: 29 [2023-04-01 18:35:29,036 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 18:35:29,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:35:29,038 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:35:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 18:35:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 18:35:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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) [2023-04-01 18:35:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 18:35:29,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2023-04-01 18:35:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:29,044 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 18:35:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-04-01 18:35:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 18:35:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:35:29,048 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:29,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:29,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:35:29,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:29,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:29,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1872460205, now seen corresponding path program 2 times [2023-04-01 18:35:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188668771] [2023-04-01 18:35:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:29,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:29,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:35:29,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188668771] [2023-04-01 18:35:29,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188668771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:35:29,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:35:29,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:35:29,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392549055] [2023-04-01 18:35:29,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:35:29,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:35:29,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:35:29,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:35:29,475 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-04-01 18:35:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:29,558 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-04-01 18:35:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 18:35:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 21 [2023-04-01 18:35:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:29,562 INFO L225 Difference]: With dead ends: 27 [2023-04-01 18:35:29,562 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 18:35:29,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:35:29,563 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:29,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:35:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 18:35:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 18:35:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2023-04-01 18:35:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 18:35:29,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2023-04-01 18:35:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:29,568 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 18:35:29,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-04-01 18:35:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 18:35:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 18:35:29,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:29,569 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:29,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:35:29,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:29,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash 154951798, now seen corresponding path program 1 times [2023-04-01 18:35:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365286561] [2023-04-01 18:35:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:29,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:29,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365286561] [2023-04-01 18:35:29,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365286561] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:29,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422439908] [2023-04-01 18:35:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:29,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:29,677 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) [2023-04-01 18:35:29,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:35:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:29,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:35:29,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:29,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422439908] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:29,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:29,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:35:29,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516556279] [2023-04-01 18:35:29,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:29,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:35:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:35:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:35:29,893 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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) [2023-04-01 18:35:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:30,127 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-04-01 18:35:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:35:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 23 [2023-04-01 18:35:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:30,129 INFO L225 Difference]: With dead ends: 45 [2023-04-01 18:35:30,129 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 18:35:30,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:35:30,130 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:30,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:35:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 18:35:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 18:35:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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) [2023-04-01 18:35:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-04-01 18:35:30,138 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 23 [2023-04-01 18:35:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:30,139 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-04-01 18:35:30,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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) [2023-04-01 18:35:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-04-01 18:35:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 18:35:30,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:30,140 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:30,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:35:30,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 18:35:30,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:30,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1159803626, now seen corresponding path program 2 times [2023-04-01 18:35:30,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:30,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648959147] [2023-04-01 18:35:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:30,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:30,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648959147] [2023-04-01 18:35:30,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648959147] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:30,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126139391] [2023-04-01 18:35:30,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:35:30,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:30,580 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) [2023-04-01 18:35:30,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:35:30,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:35:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:35:30,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:35:30,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:30,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126139391] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:30,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:35:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429546725] [2023-04-01 18:35:30,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:35:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:35:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:35:30,944 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 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) [2023-04-01 18:35:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:31,506 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2023-04-01 18:35:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:35:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 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 35 [2023-04-01 18:35:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:31,508 INFO L225 Difference]: With dead ends: 69 [2023-04-01 18:35:31,508 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 18:35:31,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:35:31,510 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:31,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 22 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:35:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 18:35:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-01 18:35:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 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) [2023-04-01 18:35:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-04-01 18:35:31,522 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 35 [2023-04-01 18:35:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:31,523 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-04-01 18:35:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 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) [2023-04-01 18:35:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-04-01 18:35:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 18:35:31,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:31,524 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:31,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 18:35:31,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:31,731 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:31,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:31,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1364480558, now seen corresponding path program 3 times [2023-04-01 18:35:31,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:31,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522846564] [2023-04-01 18:35:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:31,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:32,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:35:32,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:32,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522846564] [2023-04-01 18:35:32,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522846564] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:32,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558975520] [2023-04-01 18:35:32,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:35:32,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:32,288 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) [2023-04-01 18:35:32,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:35:32,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:35:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:35:32,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 18:35:32,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:32,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 18:35:32,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:35:32,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-04-01 18:35:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:35:32,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:32,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 18:35:32,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-04-01 18:35:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:35:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558975520] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:32,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7, 7] total 35 [2023-04-01 18:35:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777303700] [2023-04-01 18:35:32,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 18:35:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 18:35:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 18:35:32,696 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 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) [2023-04-01 18:35:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:33,552 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2023-04-01 18:35:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 18:35:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 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 59 [2023-04-01 18:35:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:33,553 INFO L225 Difference]: With dead ends: 78 [2023-04-01 18:35:33,554 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 18:35:33,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1007, Invalid=3283, Unknown=0, NotChecked=0, Total=4290 [2023-04-01 18:35:33,556 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 65 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:35:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 18:35:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-04-01 18:35:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 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) [2023-04-01 18:35:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2023-04-01 18:35:33,570 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 59 [2023-04-01 18:35:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:33,571 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2023-04-01 18:35:33,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 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) [2023-04-01 18:35:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2023-04-01 18:35:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:35:33,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:33,574 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:33,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:35:33,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:33,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:33,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2113972310, now seen corresponding path program 4 times [2023-04-01 18:35:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:33,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903266003] [2023-04-01 18:35:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:34,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903266003] [2023-04-01 18:35:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903266003] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302953634] [2023-04-01 18:35:34,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:35:34,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:34,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:34,318 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) [2023-04-01 18:35:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:35:34,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:35:34,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:35:34,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:35:34,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:34,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:35,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302953634] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:35,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:35,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2023-04-01 18:35:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763140679] [2023-04-01 18:35:35,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:35,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:35:35,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:35:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:35:35,247 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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) [2023-04-01 18:35:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:36,678 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2023-04-01 18:35:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 18:35:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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 65 [2023-04-01 18:35:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:36,680 INFO L225 Difference]: With dead ends: 129 [2023-04-01 18:35:36,680 INFO L226 Difference]: Without dead ends: 116 [2023-04-01 18:35:36,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 18:35:36,685 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:36,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 42 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:35:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-01 18:35:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-04-01 18:35:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 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) [2023-04-01 18:35:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-04-01 18:35:36,697 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 65 [2023-04-01 18:35:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:36,698 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-04-01 18:35:36,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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) [2023-04-01 18:35:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-04-01 18:35:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 18:35:36,699 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:36,699 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:36,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:35:36,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:36,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:36,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1209624284, now seen corresponding path program 5 times [2023-04-01 18:35:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280600339] [2023-04-01 18:35:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:38,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280600339] [2023-04-01 18:35:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280600339] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649390238] [2023-04-01 18:35:38,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:35:38,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:38,957 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) [2023-04-01 18:35:38,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:35:42,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-04-01 18:35:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:35:42,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:35:42,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:42,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649390238] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:45,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:45,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:35:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553350349] [2023-04-01 18:35:45,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:45,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:35:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:35:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:35:45,524 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 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) [2023-04-01 18:35:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:35:49,547 INFO L93 Difference]: Finished difference Result 229 states and 280 transitions. [2023-04-01 18:35:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:35:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 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 115 [2023-04-01 18:35:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:35:49,552 INFO L225 Difference]: With dead ends: 229 [2023-04-01 18:35:49,552 INFO L226 Difference]: Without dead ends: 216 [2023-04-01 18:35:49,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:35:49,559 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 208 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:35:49,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 32 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:35:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-04-01 18:35:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-04-01 18:35:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 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) [2023-04-01 18:35:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2023-04-01 18:35:49,577 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 115 [2023-04-01 18:35:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:35:49,578 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2023-04-01 18:35:49,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 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) [2023-04-01 18:35:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2023-04-01 18:35:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-01 18:35:49,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:35:49,581 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:35:49,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:35:49,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:49,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:35:49,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:35:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1784206272, now seen corresponding path program 6 times [2023-04-01 18:35:49,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:35:49,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989285653] [2023-04-01 18:35:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:35:49,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:35:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:55,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:35:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:35:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:35:55,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:35:55,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989285653] [2023-04-01 18:35:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989285653] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:35:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405607861] [2023-04-01 18:35:55,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:35:55,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:35:55,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:35:55,451 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) [2023-04-01 18:35:55,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:35:55,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-01 18:35:55,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:35:55,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 18:35:55,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:35:55,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 18:35:56,098 INFO L321 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2023-04-01 18:35:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 47 [2023-04-01 18:35:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-04-01 18:35:56,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:35:57,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-04-01 18:35:57,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:35:57,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2023-04-01 18:35:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-04-01 18:35:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405607861] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:35:57,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:35:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 11, 11] total 119 [2023-04-01 18:35:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886741236] [2023-04-01 18:35:57,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:35:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-04-01 18:35:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:35:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-04-01 18:35:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=8914, Unknown=0, NotChecked=0, Total=14042 [2023-04-01 18:35:57,136 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 119 states, 119 states have (on average 1.9579831932773109) internal successors, (233), 118 states have internal predecessors, (233), 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) [2023-04-01 18:36:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:03,718 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2023-04-01 18:36:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-04-01 18:36:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9579831932773109) internal successors, (233), 118 states have internal predecessors, (233), 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 215 [2023-04-01 18:36:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:03,721 INFO L225 Difference]: With dead ends: 244 [2023-04-01 18:36:03,721 INFO L226 Difference]: Without dead ends: 227 [2023-04-01 18:36:03,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9584 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=15469, Invalid=39991, Unknown=0, NotChecked=0, Total=55460 [2023-04-01 18:36:03,727 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 263 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:03,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 68 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:36:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-01 18:36:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-04-01 18:36:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 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) [2023-04-01 18:36:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2023-04-01 18:36:03,760 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 215 [2023-04-01 18:36:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:03,760 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2023-04-01 18:36:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9579831932773109) internal successors, (233), 118 states have internal predecessors, (233), 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) [2023-04-01 18:36:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2023-04-01 18:36:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 18:36:03,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:03,763 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:03,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 18:36:03,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:03,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:03,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash -21041718, now seen corresponding path program 7 times [2023-04-01 18:36:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394589759] [2023-04-01 18:36:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:09,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 18:36:09,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394589759] [2023-04-01 18:36:09,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394589759] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811369389] [2023-04-01 18:36:09,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:36:09,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:09,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:09,423 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) [2023-04-01 18:36:09,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:36:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:09,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 18:36:09,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 18:36:10,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 18:36:19,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811369389] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:19,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:19,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2023-04-01 18:36:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704519017] [2023-04-01 18:36:19,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:19,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2023-04-01 18:36:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2023-04-01 18:36:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2023-04-01 18:36:19,599 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 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) [2023-04-01 18:36:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:34,138 INFO L93 Difference]: Finished difference Result 449 states and 551 transitions. [2023-04-01 18:36:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-04-01 18:36:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 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 225 [2023-04-01 18:36:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:34,147 INFO L225 Difference]: With dead ends: 449 [2023-04-01 18:36:34,147 INFO L226 Difference]: Without dead ends: 428 [2023-04-01 18:36:34,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2023-04-01 18:36:34,154 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 412 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:34,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 37 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:36:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-04-01 18:36:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2023-04-01 18:36:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 424 states have (on average 1.0047169811320755) internal successors, (426), 424 states have internal predecessors, (426), 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) [2023-04-01 18:36:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 429 transitions. [2023-04-01 18:36:34,184 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 429 transitions. Word has length 225 [2023-04-01 18:36:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:34,184 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 429 transitions. [2023-04-01 18:36:34,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 2.0245098039215685) internal successors, (413), 203 states have internal predecessors, (413), 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) [2023-04-01 18:36:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 429 transitions. [2023-04-01 18:36:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-04-01 18:36:34,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:34,189 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:34,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:36:34,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 18:36:34,396 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:34,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 930996480, now seen corresponding path program 8 times [2023-04-01 18:36:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:34,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044854376] [2023-04-01 18:36:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:55,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 18:36:55,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044854376] [2023-04-01 18:36:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044854376] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:55,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680285030] [2023-04-01 18:36:55,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:36:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:55,278 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) [2023-04-01 18:36:55,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:36:55,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:36:55,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:36:55,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-01 18:36:55,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 18:36:56,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:37:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 18:37:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680285030] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:37:34,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:37:34,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [204, 203, 203] total 406 [2023-04-01 18:37:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416916657] [2023-04-01 18:37:34,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:37:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 406 states [2023-04-01 18:37:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:37:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 406 interpolants. [2023-04-01 18:37:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81812, Invalid=82618, Unknown=0, NotChecked=0, Total=164430 [2023-04-01 18:37:34,214 INFO L87 Difference]: Start difference. First operand 428 states and 429 transitions. Second operand has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 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) [2023-04-01 18:38:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:38:32,695 INFO L93 Difference]: Finished difference Result 853 states and 1056 transitions. [2023-04-01 18:38:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2023-04-01 18:38:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 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 427 [2023-04-01 18:38:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:38:32,699 INFO L225 Difference]: With dead ends: 853 [2023-04-01 18:38:32,699 INFO L226 Difference]: Without dead ends: 832 [2023-04-01 18:38:32,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101901 ImplicationChecksByTransitivity, 104.4s TimeCoverageRelationStatistics Valid=244623, Invalid=407433, Unknown=0, NotChecked=0, Total=652056 [2023-04-01 18:38:32,729 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 816 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:38:32,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 27 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 18:38:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2023-04-01 18:38:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2023-04-01 18:38:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 828 states have (on average 1.002415458937198) internal successors, (830), 828 states have internal predecessors, (830), 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) [2023-04-01 18:38:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 833 transitions. [2023-04-01 18:38:32,774 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 833 transitions. Word has length 427 [2023-04-01 18:38:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:38:32,774 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 833 transitions. [2023-04-01 18:38:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 406 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 405 states have internal predecessors, (817), 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) [2023-04-01 18:38:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 833 transitions. [2023-04-01 18:38:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2023-04-01 18:38:32,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:38:32,795 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:38:32,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:38:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:38:33,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:38:33,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:38:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash -872688404, now seen corresponding path program 9 times [2023-04-01 18:38:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:38:33,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419862671] [2023-04-01 18:38:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:38:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:38:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat