/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:06:17,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:06:17,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:06:17,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:06:17,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:06:17,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:06:17,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:06:17,418 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 [2023-03-30 22:06:17,439 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:06:17,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:06:17,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:06:17,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:06:17,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:06:17,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:06:17,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:06:17,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:06:17,441 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:06:17,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:06:17,442 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:06:17,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:06:17,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:06:17,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:06:17,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:06:17,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:06:17,444 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:06:17,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:06:17,444 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:06:17,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:06:17,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:06:17,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:06:17,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:06:17,627 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:06:17,627 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:06:17,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2023-03-30 22:06:18,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:06:18,821 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:06:18,821 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2023-03-30 22:06:18,825 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7412486/4e2487bd74db48f59e982b9ebd043874/FLAGea71be27c [2023-03-30 22:06:18,837 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7412486/4e2487bd74db48f59e982b9ebd043874 [2023-03-30 22:06:18,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:06:18,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:06:18,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:06:18,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:06:18,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:06:18,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:18,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f9a84f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18, skipping insertion in model container [2023-03-30 22:06:18,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:18,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:06:18,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:06:18,949 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i[816,829] [2023-03-30 22:06:18,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:06:18,968 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:06:18,976 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i[816,829] [2023-03-30 22:06:18,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:06:18,993 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:06:18,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18 WrapperNode [2023-03-30 22:06:18,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:06:18,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:06:18,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:06:18,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:06:19,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:06:19,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:06:19,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:06:19,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:06:19,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (1/1) ... [2023-03-30 22:06:19,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:06:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:19,060 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) [2023-03-30 22:06:19,063 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 [2023-03-30 22:06:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:06:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:06:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:06:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:06:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:06:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:06:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:06:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:06:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:06:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:06:19,139 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:06:19,141 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:06:19,341 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:06:19,345 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:06:19,346 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-03-30 22:06:19,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:06:19 BoogieIcfgContainer [2023-03-30 22:06:19,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:06:19,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:06:19,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:06:19,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:06:19,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:06:18" (1/3) ... [2023-03-30 22:06:19,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9e55f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:06:19, skipping insertion in model container [2023-03-30 22:06:19,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:06:18" (2/3) ... [2023-03-30 22:06:19,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9e55f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:06:19, skipping insertion in model container [2023-03-30 22:06:19,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:06:19" (3/3) ... [2023-03-30 22:06:19,353 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2023-03-30 22:06:19,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:06:19,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:06:19,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:06:19,405 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;@441f81d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:06:19,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:06:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:06:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-30 22:06:19,419 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:19,419 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, 1, 1, 1, 1, 1] [2023-03-30 22:06:19,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:19,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1794668349, now seen corresponding path program 1 times [2023-03-30 22:06:19,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226934871] [2023-03-30 22:06:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:19,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:19,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:06:19,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:19,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226934871] [2023-03-30 22:06:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226934871] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:06:19,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:06:19,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:06:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725696404] [2023-03-30 22:06:19,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:06:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:06:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:06:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:06:19,723 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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) [2023-03-30 22:06:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:19,867 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2023-03-30 22:06:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:06:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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 25 [2023-03-30 22:06:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:19,873 INFO L225 Difference]: With dead ends: 76 [2023-03-30 22:06:19,873 INFO L226 Difference]: Without dead ends: 37 [2023-03-30 22:06:19,875 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 [2023-03-30 22:06:19,879 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:19,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 10 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:06:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-30 22:06:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-03-30 22:06:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-03-30 22:06:19,919 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2023-03-30 22:06:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:19,919 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-03-30 22:06:19,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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) [2023-03-30 22:06:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-03-30 22:06:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-30 22:06:19,920 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:19,920 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, 1, 1, 1, 1, 1] [2023-03-30 22:06:19,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:06:19,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:19,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -552728009, now seen corresponding path program 1 times [2023-03-30 22:06:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878339569] [2023-03-30 22:06:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:06:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:20,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878339569] [2023-03-30 22:06:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878339569] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:06:20,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:06:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:06:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685571765] [2023-03-30 22:06:20,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:06:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:06:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:06:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:06:20,011 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2023-03-30 22:06:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:20,091 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2023-03-30 22:06:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:06:20,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2023-03-30 22:06:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:20,094 INFO L225 Difference]: With dead ends: 68 [2023-03-30 22:06:20,094 INFO L226 Difference]: Without dead ends: 39 [2023-03-30 22:06:20,096 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 [2023-03-30 22:06:20,097 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:20,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:06:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-30 22:06:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-03-30 22:06:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-03-30 22:06:20,104 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2023-03-30 22:06:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:20,104 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-03-30 22:06:20,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2023-03-30 22:06:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-03-30 22:06:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:06:20,104 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:20,105 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, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:06:20,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:20,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2130707627, now seen corresponding path program 1 times [2023-03-30 22:06:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:20,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772037100] [2023-03-30 22:06:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:06:20,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:20,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772037100] [2023-03-30 22:06:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772037100] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:20,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697008823] [2023-03-30 22:06:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:20,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:20,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:20,197 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) [2023-03-30 22:06:20,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:06:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:06:20,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:06:20,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:06:20,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697008823] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:06:20,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:06:20,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:06:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998178551] [2023-03-30 22:06:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:06:20,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:06:20,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:06:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:06:20,310 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:06:20,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:20,367 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-03-30 22:06:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:06:20,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-03-30 22:06:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:20,370 INFO L225 Difference]: With dead ends: 76 [2023-03-30 22:06:20,370 INFO L226 Difference]: Without dead ends: 50 [2023-03-30 22:06:20,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:06:20,372 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:20,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:06:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-30 22:06:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-03-30 22:06:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-03-30 22:06:20,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2023-03-30 22:06:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:20,386 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-03-30 22:06:20,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:06:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-03-30 22:06:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 22:06:20,387 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:20,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:20,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:06:20,592 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 [2023-03-30 22:06:20,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:20,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:20,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1489180489, now seen corresponding path program 1 times [2023-03-30 22:06:20,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:20,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442274275] [2023-03-30 22:06:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:20,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:06:20,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:20,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442274275] [2023-03-30 22:06:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442274275] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010365515] [2023-03-30 22:06:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:20,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:20,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:20,663 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) [2023-03-30 22:06:20,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:06:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:20,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:06:20,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:06:20,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:06:20,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010365515] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:20,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:20,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:06:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760805813] [2023-03-30 22:06:20,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:20,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:06:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:06:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:06:20,825 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2023-03-30 22:06:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:20,940 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2023-03-30 22:06:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:06:20,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 39 [2023-03-30 22:06:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:20,942 INFO L225 Difference]: With dead ends: 85 [2023-03-30 22:06:20,942 INFO L226 Difference]: Without dead ends: 50 [2023-03-30 22:06:20,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:06:20,945 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:20,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:06:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-30 22:06:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-03-30 22:06:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-03-30 22:06:20,957 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 39 [2023-03-30 22:06:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:20,957 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-03-30 22:06:20,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2023-03-30 22:06:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-03-30 22:06:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-30 22:06:20,960 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:20,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:20,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:21,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:06:21,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:21,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1027135139, now seen corresponding path program 2 times [2023-03-30 22:06:21,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:21,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113170574] [2023-03-30 22:06:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:21,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:21,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:06:21,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113170574] [2023-03-30 22:06:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113170574] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478667569] [2023-03-30 22:06:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:06:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:21,296 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) [2023-03-30 22:06:21,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:06:21,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:06:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:21,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:06:21,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:06:21,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:06:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478667569] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:21,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:21,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:06:21,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447270442] [2023-03-30 22:06:21,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:21,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:06:21,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:06:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:06:21,441 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 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) [2023-03-30 22:06:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:21,606 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2023-03-30 22:06:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:06:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 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 [2023-03-30 22:06:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:21,609 INFO L225 Difference]: With dead ends: 117 [2023-03-30 22:06:21,609 INFO L226 Difference]: Without dead ends: 86 [2023-03-30 22:06:21,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:06:21,610 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:21,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 17 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:06:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-03-30 22:06:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-03-30 22:06:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2023-03-30 22:06:21,636 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 45 [2023-03-30 22:06:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:21,636 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2023-03-30 22:06:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 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) [2023-03-30 22:06:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2023-03-30 22:06:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-30 22:06:21,641 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:21,641 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:21,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 22:06:21,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:21,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:21,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2055344511, now seen corresponding path program 3 times [2023-03-30 22:06:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:21,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538113713] [2023-03-30 22:06:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-30 22:06:21,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:21,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538113713] [2023-03-30 22:06:21,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538113713] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:21,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326947997] [2023-03-30 22:06:21,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:06:21,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:21,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:21,977 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) [2023-03-30 22:06:21,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:06:22,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-30 22:06:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:22,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:06:22,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-30 22:06:22,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-30 22:06:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326947997] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:22,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:22,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-03-30 22:06:22,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427043365] [2023-03-30 22:06:22,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:22,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 22:06:22,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 22:06:22,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:06:22,523 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 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) [2023-03-30 22:06:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:22,953 INFO L93 Difference]: Finished difference Result 232 states and 282 transitions. [2023-03-30 22:06:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 22:06:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 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 81 [2023-03-30 22:06:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:22,954 INFO L225 Difference]: With dead ends: 232 [2023-03-30 22:06:22,954 INFO L226 Difference]: Without dead ends: 161 [2023-03-30 22:06:22,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2023-03-30 22:06:22,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 255 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:22,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 47 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:06:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-03-30 22:06:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2023-03-30 22:06:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.051948051948052) internal successors, (162), 154 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 167 transitions. [2023-03-30 22:06:22,966 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 167 transitions. Word has length 81 [2023-03-30 22:06:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:22,966 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 167 transitions. [2023-03-30 22:06:22,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 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) [2023-03-30 22:06:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 167 transitions. [2023-03-30 22:06:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-03-30 22:06:22,981 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:22,982 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:22,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:23,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:23,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:23,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 193056341, now seen corresponding path program 4 times [2023-03-30 22:06:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032685089] [2023-03-30 22:06:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:23,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-03-30 22:06:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032685089] [2023-03-30 22:06:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032685089] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251750732] [2023-03-30 22:06:23,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:06:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:23,401 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) [2023-03-30 22:06:23,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:06:23,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:06:23,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:06:23,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:06:23,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:06:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-03-30 22:06:23,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:06:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-03-30 22:06:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251750732] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:06:23,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:06:23,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-03-30 22:06:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255996762] [2023-03-30 22:06:23,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:06:23,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 22:06:23,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:06:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 22:06:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2023-03-30 22:06:23,671 INFO L87 Difference]: Start difference. First operand 160 states and 167 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 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) [2023-03-30 22:06:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:06:23,844 INFO L93 Difference]: Finished difference Result 317 states and 337 transitions. [2023-03-30 22:06:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:06:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 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 155 [2023-03-30 22:06:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:06:23,845 INFO L225 Difference]: With dead ends: 317 [2023-03-30 22:06:23,845 INFO L226 Difference]: Without dead ends: 174 [2023-03-30 22:06:23,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2023-03-30 22:06:23,848 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:06:23,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:06:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-03-30 22:06:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2023-03-30 22:06:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 168 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:06:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 181 transitions. [2023-03-30 22:06:23,865 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 181 transitions. Word has length 155 [2023-03-30 22:06:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:06:23,866 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 181 transitions. [2023-03-30 22:06:23,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 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) [2023-03-30 22:06:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 181 transitions. [2023-03-30 22:06:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-03-30 22:06:23,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:06:23,867 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:06:23,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:06:24,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:24,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:06:24,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:06:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash -363949017, now seen corresponding path program 5 times [2023-03-30 22:06:24,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:06:24,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814170964] [2023-03-30 22:06:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:06:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:06:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:06:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:06:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-03-30 22:06:24,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:06:24,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814170964] [2023-03-30 22:06:24,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814170964] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:06:24,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728741587] [2023-03-30 22:06:24,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:06:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:06:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:06:24,490 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) [2023-03-30 22:06:24,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process