/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/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:08:08,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:08:08,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:08:08,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 00:08:08,317 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 [2023-04-02 00:08:08,344 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:08:08,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:08:08,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:08:08,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:08:08,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:08:08,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:08:08,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:08:08,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:08:08,347 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:08:08,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:08:08,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:08:08,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:08:08,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:08:08,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:08:08,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:08:08,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:08:08,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:08:08,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:08:08,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:08:08,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:08:08,351 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:08:08,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:08:08,351 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:08:08,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:08:08,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:08:08,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:08:08,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:08:08,611 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:08:08,611 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:08:08,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_net_1.c [2023-04-02 00:08:09,720 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:08:10,418 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:08:10,419 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_net_1.c [2023-04-02 00:08:10,511 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4ee175d/6bcd054aee644688ab067485ddfc1a66/FLAGff3256c23 [2023-04-02 00:08:10,524 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4ee175d/6bcd054aee644688ab067485ddfc1a66 [2023-04-02 00:08:10,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:08:10,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:08:10,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:08:10,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:08:10,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:08:10,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:08:10" (1/1) ... [2023-04-02 00:08:10,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23501bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:10, skipping insertion in model container [2023-04-02 00:08:10,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:08:10" (1/1) ... [2023-04-02 00:08:10,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:08:10,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:08:12,105 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/psyco/psyco_net_1.c[2349407,2349420] [2023-04-02 00:08:12,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:08:12,178 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:08:12,907 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/psyco/psyco_net_1.c[2349407,2349420] [2023-04-02 00:08:12,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:08:12,962 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:08:12,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12 WrapperNode [2023-04-02 00:08:12,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:08:12,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:08:12,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:08:12,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:08:12,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:12,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:13,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:13,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:13,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:13,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:13,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:13,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:14,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:08:14,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:08:14,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:08:14,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:08:14,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (1/1) ... [2023-04-02 00:08:14,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:08:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:08:14,173 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) [2023-04-02 00:08:14,194 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 [2023-04-02 00:08:14,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:08:14,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:08:14,214 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:08:14,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:08:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:08:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:08:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:08:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:08:14,841 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:08:14,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:08:26,952 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:08:27,010 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:08:27,010 INFO L302 CfgBuilder]: Removed 1130 assume(true) statements. [2023-04-02 00:08:27,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:08:27 BoogieIcfgContainer [2023-04-02 00:08:27,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:08:27,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:08:27,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:08:27,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:08:27,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:08:10" (1/3) ... [2023-04-02 00:08:27,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e10e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:08:27, skipping insertion in model container [2023-04-02 00:08:27,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:08:12" (2/3) ... [2023-04-02 00:08:27,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e10e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:08:27, skipping insertion in model container [2023-04-02 00:08:27,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:08:27" (3/3) ... [2023-04-02 00:08:27,033 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2023-04-02 00:08:27,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:08:27,050 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:08:27,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:08:27,260 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;@2d2ec377, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:08:27,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:08:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 9216 states, 9210 states have (on average 1.9993485342019544) internal successors, (18414), 9211 states have internal predecessors, (18414), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 00:08:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 00:08:27,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:08:27,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:08:27,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:08:27,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:08:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -521022656, now seen corresponding path program 1 times [2023-04-02 00:08:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:08:27,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552578091] [2023-04-02 00:08:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:08:27,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:08:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:08:27,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:08:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:08:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:08:27,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:08:27,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552578091] [2023-04-02 00:08:27,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552578091] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:08:27,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:08:27,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 00:08:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370831302] [2023-04-02 00:08:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:08:27,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:08:27,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:08:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:08:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 00:08:27,922 INFO L87 Difference]: Start difference. First operand has 9216 states, 9210 states have (on average 1.9993485342019544) internal successors, (18414), 9211 states have internal predecessors, (18414), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:08:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:08:52,927 INFO L93 Difference]: Finished difference Result 17704 states and 35386 transitions. [2023-04-02 00:08:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:08:52,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 00:08:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:08:52,985 INFO L225 Difference]: With dead ends: 17704 [2023-04-02 00:08:52,985 INFO L226 Difference]: Without dead ends: 8284 [2023-04-02 00:08:53,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 00:08:53,012 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14145 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14145 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 14148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2023-04-02 00:08:53,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14145 Valid, 10 Invalid, 14148 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 14147 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2023-04-02 00:08:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2023-04-02 00:08:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2023-04-02 00:08:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8280 states have (on average 1.569806763285024) internal successors, (12998), 8280 states have internal predecessors, (12998), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:08:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 13001 transitions. [2023-04-02 00:08:53,327 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 13001 transitions. Word has length 13 [2023-04-02 00:08:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:08:53,328 INFO L495 AbstractCegarLoop]: Abstraction has 8284 states and 13001 transitions. [2023-04-02 00:08:53,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:08:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 13001 transitions. [2023-04-02 00:08:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 00:08:53,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:08:53,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:08:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:08:53,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:08:53,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:08:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1559228349, now seen corresponding path program 1 times [2023-04-02 00:08:53,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:08:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612001396] [2023-04-02 00:08:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:08:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:08:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:08:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:08:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:08:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:08:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:08:53,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612001396] [2023-04-02 00:08:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612001396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:08:53,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:08:53,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:08:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083459215] [2023-04-02 00:08:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:08:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:08:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:08:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:08:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:08:53,670 INFO L87 Difference]: Start difference. First operand 8284 states and 13001 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:09:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:09:19,221 INFO L93 Difference]: Finished difference Result 16565 states and 26000 transitions. [2023-04-02 00:09:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:09:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 00:09:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:09:19,256 INFO L225 Difference]: With dead ends: 16565 [2023-04-02 00:09:19,256 INFO L226 Difference]: Without dead ends: 8287 [2023-04-02 00:09:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:09:19,269 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13003 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25988 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13003 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-04-02 00:09:19,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13003 Valid, 12 Invalid, 25990 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 25988 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2023-04-02 00:09:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2023-04-02 00:09:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 8287. [2023-04-02 00:09:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8287 states, 8283 states have (on average 1.569600386333454) internal successors, (13001), 8283 states have internal predecessors, (13001), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:09:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8287 states to 8287 states and 13004 transitions. [2023-04-02 00:09:19,452 INFO L78 Accepts]: Start accepts. Automaton has 8287 states and 13004 transitions. Word has length 14 [2023-04-02 00:09:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:09:19,452 INFO L495 AbstractCegarLoop]: Abstraction has 8287 states and 13004 transitions. [2023-04-02 00:09:19,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:09:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8287 states and 13004 transitions. [2023-04-02 00:09:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 00:09:19,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:09:19,464 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:09:19,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:09:19,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:09:19,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:09:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 105615363, now seen corresponding path program 1 times [2023-04-02 00:09:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:09:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130257740] [2023-04-02 00:09:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:09:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:09:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:09:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:09:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:09:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:09:19,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:09:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130257740] [2023-04-02 00:09:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130257740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:09:19,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:09:19,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:09:19,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923158070] [2023-04-02 00:09:19,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:09:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:09:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:09:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:09:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:09:19,726 INFO L87 Difference]: Start difference. First operand 8287 states and 13004 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:09:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:09:44,948 INFO L93 Difference]: Finished difference Result 16573 states and 26009 transitions. [2023-04-02 00:09:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:09:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 00:09:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:09:44,976 INFO L225 Difference]: With dead ends: 16573 [2023-04-02 00:09:44,976 INFO L226 Difference]: Without dead ends: 8293 [2023-04-02 00:09:44,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:09:44,987 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13329 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25633 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13329 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 25633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2023-04-02 00:09:44,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13329 Valid, 12 Invalid, 25670 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [37 Valid, 25633 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2023-04-02 00:09:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8293 states. [2023-04-02 00:09:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8293 to 8291. [2023-04-02 00:09:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8291 states, 8287 states have (on average 1.5693254494992157) internal successors, (13005), 8287 states have internal predecessors, (13005), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:09:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 13008 transitions. [2023-04-02 00:09:45,144 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 13008 transitions. Word has length 19 [2023-04-02 00:09:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:09:45,144 INFO L495 AbstractCegarLoop]: Abstraction has 8291 states and 13008 transitions. [2023-04-02 00:09:45,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:09:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 13008 transitions. [2023-04-02 00:09:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 00:09:45,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:09:45,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:09:45,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 00:09:45,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:09:45,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:09:45,147 INFO L85 PathProgramCache]: Analyzing trace with hash -381682576, now seen corresponding path program 1 times [2023-04-02 00:09:45,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:09:45,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834633978] [2023-04-02 00:09:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:09:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:09:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:09:45,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:09:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:09:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:09:45,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:09:45,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834633978] [2023-04-02 00:09:45,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834633978] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:09:45,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:09:45,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:09:45,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097065494] [2023-04-02 00:09:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:09:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:09:45,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:09:45,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:09:45,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:09:45,415 INFO L87 Difference]: Start difference. First operand 8291 states and 13008 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:10:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:10:06,663 INFO L93 Difference]: Finished difference Result 16495 states and 25889 transitions. [2023-04-02 00:10:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:10:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-02 00:10:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:10:06,680 INFO L225 Difference]: With dead ends: 16495 [2023-04-02 00:10:06,681 INFO L226 Difference]: Without dead ends: 8169 [2023-04-02 00:10:06,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:10:06,692 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23531 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12416 mSolverCounterSat, 1750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23531 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 14166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1750 IncrementalHoareTripleChecker+Valid, 12416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2023-04-02 00:10:06,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23531 Valid, 12 Invalid, 14166 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1750 Valid, 12416 Invalid, 0 Unknown, 0 Unchecked, 20.8s Time] [2023-04-02 00:10:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2023-04-02 00:10:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 8169. [2023-04-02 00:10:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8165 states have (on average 1.5164727495407226) internal successors, (12382), 8165 states have internal predecessors, (12382), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:10:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 12385 transitions. [2023-04-02 00:10:06,837 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 12385 transitions. Word has length 23 [2023-04-02 00:10:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:10:06,837 INFO L495 AbstractCegarLoop]: Abstraction has 8169 states and 12385 transitions. [2023-04-02 00:10:06,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:10:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 12385 transitions. [2023-04-02 00:10:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 00:10:06,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:10:06,838 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-04-02 00:10:06,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 00:10:06,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:10:06,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:10:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash -745999600, now seen corresponding path program 1 times [2023-04-02 00:10:06,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:10:06,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882091557] [2023-04-02 00:10:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:10:06,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:10:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:10:07,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:10:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:10:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:10:07,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:10:07,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882091557] [2023-04-02 00:10:07,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882091557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:10:07,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:10:07,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:10:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145106951] [2023-04-02 00:10:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:10:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:10:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:10:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:10:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:10:07,107 INFO L87 Difference]: Start difference. First operand 8169 states and 12385 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:10:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:10:47,922 INFO L93 Difference]: Finished difference Result 24493 states and 37141 transitions. [2023-04-02 00:10:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:10:47,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 00:10:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:10:47,953 INFO L225 Difference]: With dead ends: 24493 [2023-04-02 00:10:47,953 INFO L226 Difference]: Without dead ends: 16281 [2023-04-02 00:10:47,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:10:47,966 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35749 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24615 mSolverCounterSat, 1428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35749 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1428 IncrementalHoareTripleChecker+Valid, 24615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2023-04-02 00:10:47,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35749 Valid, 12 Invalid, 26043 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1428 Valid, 24615 Invalid, 0 Unknown, 0 Unchecked, 40.0s Time] [2023-04-02 00:10:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16281 states. [2023-04-02 00:10:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16281 to 14967. [2023-04-02 00:10:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14967 states, 14963 states have (on average 1.5565728797700995) internal successors, (23291), 14963 states have internal predecessors, (23291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:10:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14967 states to 14967 states and 23294 transitions. [2023-04-02 00:10:48,205 INFO L78 Accepts]: Start accepts. Automaton has 14967 states and 23294 transitions. Word has length 27 [2023-04-02 00:10:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:10:48,206 INFO L495 AbstractCegarLoop]: Abstraction has 14967 states and 23294 transitions. [2023-04-02 00:10:48,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:10:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 14967 states and 23294 transitions. [2023-04-02 00:10:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 00:10:48,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:10:48,210 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-04-02 00:10:48,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 00:10:48,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:10:48,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:10:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 675930625, now seen corresponding path program 1 times [2023-04-02 00:10:48,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:10:48,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618336142] [2023-04-02 00:10:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:10:48,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:10:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:10:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:10:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:10:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:10:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:10:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618336142] [2023-04-02 00:10:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618336142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:10:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:10:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:10:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965086861] [2023-04-02 00:10:48,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:10:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:10:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:10:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:10:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:10:48,446 INFO L87 Difference]: Start difference. First operand 14967 states and 23294 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:11:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:11:28,871 INFO L93 Difference]: Finished difference Result 37767 states and 58564 transitions. [2023-04-02 00:11:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:11:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 00:11:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:11:28,912 INFO L225 Difference]: With dead ends: 37767 [2023-04-02 00:11:28,912 INFO L226 Difference]: Without dead ends: 22525 [2023-04-02 00:11:28,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:11:28,935 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24585 mSolverCounterSat, 1488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34177 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1488 IncrementalHoareTripleChecker+Valid, 24585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.6s IncrementalHoareTripleChecker+Time [2023-04-02 00:11:28,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34177 Valid, 12 Invalid, 26073 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1488 Valid, 24585 Invalid, 0 Unknown, 0 Unchecked, 39.6s Time] [2023-04-02 00:11:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22525 states. [2023-04-02 00:11:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22525 to 21285. [2023-04-02 00:11:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21285 states, 21281 states have (on average 1.551853766270382) internal successors, (33025), 21281 states have internal predecessors, (33025), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:11:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 33028 transitions. [2023-04-02 00:11:29,427 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 33028 transitions. Word has length 29 [2023-04-02 00:11:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:11:29,428 INFO L495 AbstractCegarLoop]: Abstraction has 21285 states and 33028 transitions. [2023-04-02 00:11:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:11:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 33028 transitions. [2023-04-02 00:11:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 00:11:29,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:11:29,429 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-04-02 00:11:29,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 00:11:29,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:11:29,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:11:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1900183925, now seen corresponding path program 1 times [2023-04-02 00:11:29,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:11:29,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2418141] [2023-04-02 00:11:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:11:29,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:11:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:11:29,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:11:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:11:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:11:29,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:11:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2418141] [2023-04-02 00:11:29,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2418141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:11:29,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:11:29,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 00:11:29,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818121750] [2023-04-02 00:11:29,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:11:29,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 00:11:29,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:11:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 00:11:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:11:29,704 INFO L87 Difference]: Start difference. First operand 21285 states and 33028 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)