/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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:13:00,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:13:00,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:13:00,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:13:00,339 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 18:13:00,363 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:13:00,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:13:00,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:13:00,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:13:00,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:13:00,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:13:00,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:13:00,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:13:00,366 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:13:00,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:13:00,366 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:13:00,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:13:00,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:13:00,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:13:00,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:13:00,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:13:00,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:13:00,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:13:00,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:13:00,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:13:00,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:13:00,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:13:00,369 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:13:00,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:13:00,369 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:13:00,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:13:00,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:13:00,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:13:00,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:13:00,589 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:13:00,590 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:13:00,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-04-01 18:13:01,705 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:13:01,864 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:13:01,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-04-01 18:13:01,869 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d648d5a74/5075c99d7c564a19a359cb8d67170578/FLAGc5826bb57 [2023-04-01 18:13:01,885 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d648d5a74/5075c99d7c564a19a359cb8d67170578 [2023-04-01 18:13:01,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:13:01,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:13:01,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:13:01,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:13:01,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:13:01,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a65b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01, skipping insertion in model container [2023-04-01 18:13:01,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:13:01,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:13:01,999 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/sorting_selectionsort_2_ground.i[823,836] [2023-04-01 18:13:02,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:13:02,025 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:13:02,034 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/sorting_selectionsort_2_ground.i[823,836] [2023-04-01 18:13:02,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:13:02,051 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:13:02,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02 WrapperNode [2023-04-01 18:13:02,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:13:02,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:13:02,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:13:02,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:13:02,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:13:02,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:13:02,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:13:02,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:13:02,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (1/1) ... [2023-04-01 18:13:02,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:13:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:02,109 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 18:13:02,115 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 18:13:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:13:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:13:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:13:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:13:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:13:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:13:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:13:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:13:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:13:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:13:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:13:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:13:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:13:02,197 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:13:02,199 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:13:02,327 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:13:02,331 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:13:02,331 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-01 18:13:02,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:13:02 BoogieIcfgContainer [2023-04-01 18:13:02,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:13:02,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:13:02,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:13:02,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:13:02,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:13:01" (1/3) ... [2023-04-01 18:13:02,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a7f5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:13:02, skipping insertion in model container [2023-04-01 18:13:02,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:02" (2/3) ... [2023-04-01 18:13:02,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a7f5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:13:02, skipping insertion in model container [2023-04-01 18:13:02,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:13:02" (3/3) ... [2023-04-01 18:13:02,338 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-04-01 18:13:02,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:13:02,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:13:02,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:13:02,404 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;@451176c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:13:02,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:13:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:13:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:13:02,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:02,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:02,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:02,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash -185709015, now seen corresponding path program 1 times [2023-04-01 18:13:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046381069] [2023-04-01 18:13:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:02,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,581 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 18:13:02,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046381069] [2023-04-01 18:13:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046381069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:02,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:02,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:13:02,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971969915] [2023-04-01 18:13:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:13:02,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:02,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:13:02,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:13:02,614 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 18:13:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:02,734 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2023-04-01 18:13:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:13:02,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:13:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:02,741 INFO L225 Difference]: With dead ends: 82 [2023-04-01 18:13:02,741 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:13:02,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:13:02,753 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:02,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 10 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:13:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 18:13:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:13:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-04-01 18:13:02,794 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2023-04-01 18:13:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:02,794 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-04-01 18:13:02,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 18:13:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-04-01 18:13:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:13:02,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:02,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:02,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:13:02,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:02,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash 874426105, now seen corresponding path program 1 times [2023-04-01 18:13:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:02,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120060820] [2023-04-01 18:13:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,864 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 18:13:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:02,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120060820] [2023-04-01 18:13:02,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120060820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:02,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:13:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361299837] [2023-04-01 18:13:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:02,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:13:02,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:13:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:13:02,867 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 18:13:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:03,011 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2023-04-01 18:13:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:13:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:13:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:03,014 INFO L225 Difference]: With dead ends: 92 [2023-04-01 18:13:03,014 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 18:13:03,019 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 18:13:03,022 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:03,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 18:13:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2023-04-01 18:13:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:13:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2023-04-01 18:13:03,046 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2023-04-01 18:13:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:03,046 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-04-01 18:13:03,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 18:13:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2023-04-01 18:13:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:13:03,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:03,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:13:03,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:03,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2112897826, now seen corresponding path program 1 times [2023-04-01 18:13:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312006213] [2023-04-01 18:13:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,203 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 18:13:03,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:03,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312006213] [2023-04-01 18:13:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312006213] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:03,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713182604] [2023-04-01 18:13:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:03,210 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 18:13:03,212 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 18:13:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:13:03,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:03,301 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 18:13:03,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:03,322 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 18:13:03,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713182604] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:03,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:03,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:13:03,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076385452] [2023-04-01 18:13:03,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:13:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:13:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:13:03,324 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:03,521 INFO L93 Difference]: Finished difference Result 135 states and 186 transitions. [2023-04-01 18:13:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:13:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 18:13:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:03,523 INFO L225 Difference]: With dead ends: 135 [2023-04-01 18:13:03,523 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 18:13:03,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:13:03,524 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 193 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:03,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 27 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 18:13:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-04-01 18:13:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 88 states have internal predecessors, (116), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:13:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 137 transitions. [2023-04-01 18:13:03,536 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 137 transitions. Word has length 20 [2023-04-01 18:13:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:03,536 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 137 transitions. [2023-04-01 18:13:03,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 137 transitions. [2023-04-01 18:13:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 18:13:03,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:03,537 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:03,545 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 18:13:03,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:03,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:03,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1916933892, now seen corresponding path program 2 times [2023-04-01 18:13:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891320988] [2023-04-01 18:13:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,866 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 18:13:03,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891320988] [2023-04-01 18:13:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891320988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:03,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:03,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:13:03,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381949362] [2023-04-01 18:13:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:03,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:13:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:13:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:13:03,870 INFO L87 Difference]: Start difference. First operand 102 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 18:13:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:04,012 INFO L93 Difference]: Finished difference Result 187 states and 256 transitions. [2023-04-01 18:13:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:13:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 26 [2023-04-01 18:13:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:04,013 INFO L225 Difference]: With dead ends: 187 [2023-04-01 18:13:04,013 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 18:13:04,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:13:04,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:04,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 17 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 18:13:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2023-04-01 18:13:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:13:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 138 transitions. [2023-04-01 18:13:04,025 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 138 transitions. Word has length 26 [2023-04-01 18:13:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:04,025 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 138 transitions. [2023-04-01 18:13:04,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 18:13:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 138 transitions. [2023-04-01 18:13:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:13:04,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:04,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:13:04,026 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:04,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1533032449, now seen corresponding path program 1 times [2023-04-01 18:13:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152072827] [2023-04-01 18:13:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:04,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:13:04,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152072827] [2023-04-01 18:13:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152072827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681363138] [2023-04-01 18:13:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:04,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:04,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:04,156 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 18:13:04,158 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 18:13:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:04,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:13:04,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:04,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681363138] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:04,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:04,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-04-01 18:13:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667645158] [2023-04-01 18:13:04,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:04,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 18:13:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 18:13:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2023-04-01 18:13:04,342 INFO L87 Difference]: Start difference. First operand 103 states and 138 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:04,871 INFO L93 Difference]: Finished difference Result 319 states and 453 transitions. [2023-04-01 18:13:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 18:13:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-01 18:13:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:04,872 INFO L225 Difference]: With dead ends: 319 [2023-04-01 18:13:04,873 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 18:13:04,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2023-04-01 18:13:04,874 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 692 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:04,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 27 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:13:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 18:13:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2023-04-01 18:13:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 201 states have (on average 1.3233830845771144) internal successors, (266), 201 states have internal predecessors, (266), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 18:13:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 311 transitions. [2023-04-01 18:13:04,893 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 311 transitions. Word has length 29 [2023-04-01 18:13:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:04,893 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 311 transitions. [2023-04-01 18:13:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 311 transitions. [2023-04-01 18:13:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 18:13:04,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:04,894 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:04,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 18:13:05,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:05,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:05,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1496725584, now seen corresponding path program 2 times [2023-04-01 18:13:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586779360] [2023-04-01 18:13:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:05,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 18:13:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586779360] [2023-04-01 18:13:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586779360] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:05,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:13:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169943121] [2023-04-01 18:13:05,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:05,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:13:05,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:13:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:13:05,170 INFO L87 Difference]: Start difference. First operand 227 states and 311 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 18:13:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:05,252 INFO L93 Difference]: Finished difference Result 411 states and 572 transitions. [2023-04-01 18:13:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:13:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 44 [2023-04-01 18:13:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:05,254 INFO L225 Difference]: With dead ends: 411 [2023-04-01 18:13:05,254 INFO L226 Difference]: Without dead ends: 222 [2023-04-01 18:13:05,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:13:05,255 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:05,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 12 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-04-01 18:13:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2023-04-01 18:13:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.3197969543147208) internal successors, (260), 197 states have internal predecessors, (260), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 18:13:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 303 transitions. [2023-04-01 18:13:05,270 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 303 transitions. Word has length 44 [2023-04-01 18:13:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:05,270 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 303 transitions. [2023-04-01 18:13:05,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 18:13:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 303 transitions. [2023-04-01 18:13:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 18:13:05,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:05,271 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:05,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 18:13:05,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:05,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:05,272 INFO L85 PathProgramCache]: Analyzing trace with hash -638490134, now seen corresponding path program 1 times [2023-04-01 18:13:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074297716] [2023-04-01 18:13:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:05,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074297716] [2023-04-01 18:13:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074297716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264247280] [2023-04-01 18:13:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:05,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:05,439 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 18:13:05,441 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 18:13:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:13:05,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:05,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:05,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264247280] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:05,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:05,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:13:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87521075] [2023-04-01 18:13:05,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:05,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:13:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:13:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:13:05,702 INFO L87 Difference]: Start difference. First operand 222 states and 303 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:06,722 INFO L93 Difference]: Finished difference Result 657 states and 938 transitions. [2023-04-01 18:13:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:13:06,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-01 18:13:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:06,725 INFO L225 Difference]: With dead ends: 657 [2023-04-01 18:13:06,725 INFO L226 Difference]: Without dead ends: 462 [2023-04-01 18:13:06,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:13:06,726 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1647 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:06,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1648 Valid, 22 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 18:13:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-04-01 18:13:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 462. [2023-04-01 18:13:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 413 states have (on average 1.3268765133171914) internal successors, (548), 413 states have internal predecessors, (548), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-01 18:13:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 639 transitions. [2023-04-01 18:13:06,756 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 639 transitions. Word has length 45 [2023-04-01 18:13:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:06,756 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 639 transitions. [2023-04-01 18:13:06,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 639 transitions. [2023-04-01 18:13:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 18:13:06,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:06,758 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:06,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:06,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:06,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1605941074, now seen corresponding path program 2 times [2023-04-01 18:13:06,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:06,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271918738] [2023-04-01 18:13:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:07,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:07,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271918738] [2023-04-01 18:13:07,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271918738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:07,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112997827] [2023-04-01 18:13:07,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:13:07,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:07,423 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 18:13:07,424 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 18:13:07,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:13:07,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:07,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:13:07,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:07,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112997827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:08,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:08,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:13:08,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446506097] [2023-04-01 18:13:08,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:13:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:13:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:13:08,181 INFO L87 Difference]: Start difference. First operand 462 states and 639 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:10,687 INFO L93 Difference]: Finished difference Result 1353 states and 1946 transitions. [2023-04-01 18:13:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:13:10,688 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-01 18:13:10,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:10,691 INFO L225 Difference]: With dead ends: 1353 [2023-04-01 18:13:10,691 INFO L226 Difference]: Without dead ends: 942 [2023-04-01 18:13:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:13:10,695 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5332 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5333 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:10,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5333 Valid, 17 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 18:13:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2023-04-01 18:13:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2023-04-01 18:13:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 845 states have (on average 1.3301775147928994) internal successors, (1124), 845 states have internal predecessors, (1124), 94 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-04-01 18:13:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1311 transitions. [2023-04-01 18:13:10,739 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1311 transitions. Word has length 69 [2023-04-01 18:13:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:10,739 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 1311 transitions. [2023-04-01 18:13:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1311 transitions. [2023-04-01 18:13:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 18:13:10,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:10,745 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:10,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 18:13:10,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:10,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:10,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1783114274, now seen corresponding path program 3 times [2023-04-01 18:13:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905907307] [2023-04-01 18:13:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:10,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:13:12,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:12,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905907307] [2023-04-01 18:13:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905907307] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005876161] [2023-04-01 18:13:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:13:12,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:12,305 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 18:13:12,307 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 18:13:12,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:13:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:12,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 18:13:12,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-04-01 18:13:12,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-04-01 18:13:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005876161] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:12,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:12,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6, 6] total 58 [2023-04-01 18:13:12,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707630938] [2023-04-01 18:13:12,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-04-01 18:13:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-04-01 18:13:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2002, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 18:13:12,568 INFO L87 Difference]: Start difference. First operand 942 states and 1311 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:20,776 INFO L93 Difference]: Finished difference Result 2193 states and 3207 transitions. [2023-04-01 18:13:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 18:13:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2023-04-01 18:13:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:20,784 INFO L225 Difference]: With dead ends: 2193 [2023-04-01 18:13:20,784 INFO L226 Difference]: Without dead ends: 1350 [2023-04-01 18:13:20,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20315 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20081, Invalid=45711, Unknown=0, NotChecked=0, Total=65792 [2023-04-01 18:13:20,801 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6265 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6268 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:20,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6268 Valid, 52 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 18:13:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2023-04-01 18:13:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1331. [2023-04-01 18:13:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1230 states have (on average 1.3186991869918698) internal successors, (1622), 1230 states have internal predecessors, (1622), 98 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-04-01 18:13:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1817 transitions. [2023-04-01 18:13:20,852 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1817 transitions. Word has length 117 [2023-04-01 18:13:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:20,853 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1817 transitions. [2023-04-01 18:13:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1817 transitions. [2023-04-01 18:13:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 18:13:20,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:20,858 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:20,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 18:13:21,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:21,063 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:21,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:21,063 INFO L85 PathProgramCache]: Analyzing trace with hash 426891678, now seen corresponding path program 4 times [2023-04-01 18:13:21,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:21,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067858842] [2023-04-01 18:13:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:21,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:22,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:13:22,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067858842] [2023-04-01 18:13:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067858842] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938380704] [2023-04-01 18:13:22,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:13:22,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:22,648 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 18:13:22,658 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 18:13:22,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:13:22,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:22,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:13:22,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:13:23,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:13:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938380704] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:24,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:24,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:13:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590520109] [2023-04-01 18:13:24,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:13:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:13:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:13:24,947 INFO L87 Difference]: Start difference. First operand 1331 states and 1817 transitions. Second operand has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:35,838 INFO L93 Difference]: Finished difference Result 3609 states and 5080 transitions. [2023-04-01 18:13:35,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:13:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2023-04-01 18:13:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:35,852 INFO L225 Difference]: With dead ends: 3609 [2023-04-01 18:13:35,852 INFO L226 Difference]: Without dead ends: 2381 [2023-04-01 18:13:35,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:13:35,857 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9215 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9216 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:35,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9216 Valid, 27 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 18:13:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2023-04-01 18:13:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2023-04-01 18:13:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2180 states have (on average 1.3174311926605504) internal successors, (2872), 2180 states have internal predecessors, (2872), 198 states have call successors, (198), 3 states have call predecessors, (198), 2 states have return successors, (197), 197 states have call predecessors, (197), 197 states have call successors, (197) [2023-04-01 18:13:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 3267 transitions. [2023-04-01 18:13:35,978 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 3267 transitions. Word has length 133 [2023-04-01 18:13:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:35,978 INFO L495 AbstractCegarLoop]: Abstraction has 2381 states and 3267 transitions. [2023-04-01 18:13:35,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 3267 transitions. [2023-04-01 18:13:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-04-01 18:13:35,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:35,980 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:35,986 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 18:13:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:36,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:36,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1906088058, now seen corresponding path program 5 times [2023-04-01 18:13:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:36,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956097374] [2023-04-01 18:13:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:41,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9655 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:13:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956097374] [2023-04-01 18:13:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956097374] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935850889] [2023-04-01 18:13:41,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:13:41,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:41,318 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 18:13:41,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process