./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/eca-rers2018/Problem13.c --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/eca-rers2018/Problem13.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-23 00:02:21,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 00:02:21,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 00:02:21,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 00:02:21,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 00:02:21,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 00:02:21,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 00:02:21,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 00:02:21,840 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 00:02:21,844 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 00:02:21,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 00:02:21,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 00:02:21,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 00:02:21,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 00:02:21,847 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 00:02:21,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 00:02:21,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 00:02:21,848 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 00:02:21,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 00:02:21,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 00:02:21,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 00:02:21,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 00:02:21,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 00:02:21,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 00:02:21,851 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 00:02:21,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 00:02:21,851 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 00:02:21,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 00:02:21,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 00:02:21,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 00:02:21,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 00:02:21,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 00:02:21,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 00:02:21,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 00:02:21,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 00:02:21,855 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 00:02:21,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 00:02:21,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 00:02:21,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 00:02:21,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 00:02:21,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 00:02:21,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 00:02:21,857 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 00:02:22,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 00:02:22,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 00:02:22,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 00:02:22,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 00:02:22,188 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 00:02:22,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2018/Problem13.c [2023-11-23 00:02:23,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 00:02:24,934 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 00:02:24,936 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem13.c [2023-11-23 00:02:25,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d28e8f293/1a9284e255d14b62ae9b3aa357d520a7/FLAG58867f93a [2023-11-23 00:02:25,096 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d28e8f293/1a9284e255d14b62ae9b3aa357d520a7 [2023-11-23 00:02:25,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 00:02:25,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 00:02:25,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 00:02:25,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 00:02:25,106 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 00:02:25,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:02:25" (1/1) ... [2023-11-23 00:02:25,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745da4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:25, skipping insertion in model container [2023-11-23 00:02:25,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:02:25" (1/1) ... [2023-11-23 00:02:25,783 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 00:02:26,148 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem13.c[778,791] [2023-11-23 00:02:26,178 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem13.c[817,830] [2023-11-23 00:02:39,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 00:02:39,677 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 00:02:39,689 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem13.c[778,791] [2023-11-23 00:02:39,690 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem13.c[817,830] [2023-11-23 00:02:41,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 00:02:41,740 INFO L206 MainTranslator]: Completed translation [2023-11-23 00:02:41,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41 WrapperNode [2023-11-23 00:02:41,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 00:02:41,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 00:02:41,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 00:02:41,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 00:02:41,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:42,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:43,739 INFO L138 Inliner]: procedures = 710, calls = 701, calls flagged for inlining = 597, calls inlined = 597, statements flattened = 108770 [2023-11-23 00:02:43,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 00:02:43,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 00:02:43,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 00:02:43,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 00:02:43,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:43,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:44,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:44,030 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:44,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:45,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:45,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:45,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:45,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 00:02:45,671 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 00:02:45,671 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 00:02:45,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 00:02:45,672 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (1/1) ... [2023-11-23 00:02:45,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 00:02:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:02:45,720 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) [2023-11-23 00:02:45,739 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 [2023-11-23 00:02:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 00:02:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 00:02:45,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 00:02:45,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2023-11-23 00:02:45,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2023-11-23 00:02:45,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2023-11-23 00:02:45,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2023-11-23 00:02:45,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 00:02:46,105 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 00:02:46,110 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 00:03:03,417 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 00:03:03,508 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 00:03:03,508 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 00:03:03,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:03:03 BoogieIcfgContainer [2023-11-23 00:03:03,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 00:03:03,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 00:03:03,515 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 00:03:03,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 00:03:03,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:02:25" (1/3) ... [2023-11-23 00:03:03,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3343d345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:03:03, skipping insertion in model container [2023-11-23 00:03:03,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:02:41" (2/3) ... [2023-11-23 00:03:03,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3343d345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:03:03, skipping insertion in model container [2023-11-23 00:03:03,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:03:03" (3/3) ... [2023-11-23 00:03:03,523 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13.c [2023-11-23 00:03:03,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 00:03:03,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 00:03:03,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 00:03:03,824 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=LoopHeads, 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;@7d5dc89d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 00:03:03,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 00:03:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 3528 states, 3423 states have (on average 1.8258837277242186) internal successors, (6250), 3425 states have internal predecessors, (6250), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-23 00:03:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 00:03:03,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:03,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:03:03,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:03,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:03,870 INFO L85 PathProgramCache]: Analyzing trace with hash 990205398, now seen corresponding path program 1 times [2023-11-23 00:03:03,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:03,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825009749] [2023-11-23 00:03:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:04,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:04,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825009749] [2023-11-23 00:03:04,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825009749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:04,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:04,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97247997] [2023-11-23 00:03:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:04,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 00:03:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 00:03:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:04,485 INFO L87 Difference]: Start difference. First operand has 3528 states, 3423 states have (on average 1.8258837277242186) internal successors, (6250), 3425 states have internal predecessors, (6250), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:16,820 INFO L93 Difference]: Finished difference Result 9545 states and 17562 transitions. [2023-11-23 00:03:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 00:03:16,825 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 00:03:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:16,860 INFO L225 Difference]: With dead ends: 9545 [2023-11-23 00:03:16,861 INFO L226 Difference]: Without dead ends: 6012 [2023-11-23 00:03:16,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:16,875 INFO L413 NwaCegarLoop]: 6276 mSDtfsCounter, 3161 mSDsluCounter, 3904 mSDsCounter, 0 mSdLazyCounter, 13271 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3161 SdHoareTripleChecker+Valid, 10180 SdHoareTripleChecker+Invalid, 13883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 13271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:16,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3161 Valid, 10180 Invalid, 13883 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [612 Valid, 13271 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-11-23 00:03:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2023-11-23 00:03:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 5242. [2023-11-23 00:03:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5242 states, 5140 states have (on average 1.7846303501945526) internal successors, (9173), 5239 states have internal predecessors, (9173), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5242 states to 5242 states and 9273 transitions. [2023-11-23 00:03:17,084 INFO L78 Accepts]: Start accepts. Automaton has 5242 states and 9273 transitions. Word has length 12 [2023-11-23 00:03:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:17,085 INFO L495 AbstractCegarLoop]: Abstraction has 5242 states and 9273 transitions. [2023-11-23 00:03:17,085 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5242 states and 9273 transitions. [2023-11-23 00:03:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 00:03:17,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:17,089 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] [2023-11-23 00:03:17,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 00:03:17,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:17,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1807079401, now seen corresponding path program 1 times [2023-11-23 00:03:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112685957] [2023-11-23 00:03:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112685957] [2023-11-23 00:03:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112685957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:17,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129028751] [2023-11-23 00:03:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:17,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 00:03:17,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:17,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 00:03:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:17,362 INFO L87 Difference]: Start difference. First operand 5242 states and 9273 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:22,966 INFO L93 Difference]: Finished difference Result 11844 states and 20867 transitions. [2023-11-23 00:03:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 00:03:22,967 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 00:03:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:22,989 INFO L225 Difference]: With dead ends: 11844 [2023-11-23 00:03:22,989 INFO L226 Difference]: Without dead ends: 6603 [2023-11-23 00:03:22,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:22,997 INFO L413 NwaCegarLoop]: 6512 mSDtfsCounter, 1944 mSDsluCounter, 3292 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 9804 SdHoareTripleChecker+Invalid, 4761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:22,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 9804 Invalid, 4761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-23 00:03:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2023-11-23 00:03:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6110. [2023-11-23 00:03:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 6008 states have (on average 1.7496671105193076) internal successors, (10512), 6107 states have internal predecessors, (10512), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 10612 transitions. [2023-11-23 00:03:23,117 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 10612 transitions. Word has length 21 [2023-11-23 00:03:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:23,117 INFO L495 AbstractCegarLoop]: Abstraction has 6110 states and 10612 transitions. [2023-11-23 00:03:23,117 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 10612 transitions. [2023-11-23 00:03:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 00:03:23,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:23,119 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] [2023-11-23 00:03:23,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 00:03:23,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 335599713, now seen corresponding path program 1 times [2023-11-23 00:03:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933864930] [2023-11-23 00:03:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:23,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:23,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933864930] [2023-11-23 00:03:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933864930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:23,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:23,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 00:03:23,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348051606] [2023-11-23 00:03:23,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:23,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 00:03:23,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 00:03:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:23,235 INFO L87 Difference]: Start difference. First operand 6110 states and 10612 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:23,541 INFO L93 Difference]: Finished difference Result 17795 states and 30929 transitions. [2023-11-23 00:03:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 00:03:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-23 00:03:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:23,595 INFO L225 Difference]: With dead ends: 17795 [2023-11-23 00:03:23,595 INFO L226 Difference]: Without dead ends: 11686 [2023-11-23 00:03:23,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:23,608 INFO L413 NwaCegarLoop]: 6283 mSDtfsCounter, 6150 mSDsluCounter, 6029 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6150 SdHoareTripleChecker+Valid, 12312 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:23,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6150 Valid, 12312 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 00:03:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11686 states. [2023-11-23 00:03:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11686 to 11587. [2023-11-23 00:03:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11587 states, 11485 states have (on average 1.7508053983456682) internal successors, (20108), 11584 states have internal predecessors, (20108), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11587 states to 11587 states and 20208 transitions. [2023-11-23 00:03:23,831 INFO L78 Accepts]: Start accepts. Automaton has 11587 states and 20208 transitions. Word has length 31 [2023-11-23 00:03:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:23,836 INFO L495 AbstractCegarLoop]: Abstraction has 11587 states and 20208 transitions. [2023-11-23 00:03:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 11587 states and 20208 transitions. [2023-11-23 00:03:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 00:03:23,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:23,838 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] [2023-11-23 00:03:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 00:03:23,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:23,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1588360543, now seen corresponding path program 1 times [2023-11-23 00:03:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:23,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108098269] [2023-11-23 00:03:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:23,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:23,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108098269] [2023-11-23 00:03:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108098269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:23,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:23,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:23,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60916255] [2023-11-23 00:03:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:23,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 00:03:23,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 00:03:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:23,949 INFO L87 Difference]: Start difference. First operand 11587 states and 20208 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:24,833 INFO L93 Difference]: Finished difference Result 34078 states and 59451 transitions. [2023-11-23 00:03:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 00:03:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-23 00:03:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:24,875 INFO L225 Difference]: With dead ends: 34078 [2023-11-23 00:03:24,876 INFO L226 Difference]: Without dead ends: 22492 [2023-11-23 00:03:24,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:24,900 INFO L413 NwaCegarLoop]: 6755 mSDtfsCounter, 5696 mSDsluCounter, 5870 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5696 SdHoareTripleChecker+Valid, 12625 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:24,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5696 Valid, 12625 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 00:03:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22492 states. [2023-11-23 00:03:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22492 to 22379. [2023-11-23 00:03:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22379 states, 22277 states have (on average 1.749517439511604) internal successors, (38974), 22376 states have internal predecessors, (38974), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22379 states to 22379 states and 39074 transitions. [2023-11-23 00:03:25,245 INFO L78 Accepts]: Start accepts. Automaton has 22379 states and 39074 transitions. Word has length 31 [2023-11-23 00:03:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:25,246 INFO L495 AbstractCegarLoop]: Abstraction has 22379 states and 39074 transitions. [2023-11-23 00:03:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 22379 states and 39074 transitions. [2023-11-23 00:03:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 00:03:25,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:25,248 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] [2023-11-23 00:03:25,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 00:03:25,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:25,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1995237496, now seen corresponding path program 1 times [2023-11-23 00:03:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:25,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204794670] [2023-11-23 00:03:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204794670] [2023-11-23 00:03:25,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204794670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:25,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:25,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 00:03:25,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287237716] [2023-11-23 00:03:25,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:25,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 00:03:25,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 00:03:25,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:25,357 INFO L87 Difference]: Start difference. First operand 22379 states and 39074 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:25,731 INFO L93 Difference]: Finished difference Result 66926 states and 116839 transitions. [2023-11-23 00:03:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 00:03:25,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-23 00:03:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:25,834 INFO L225 Difference]: With dead ends: 66926 [2023-11-23 00:03:25,835 INFO L226 Difference]: Without dead ends: 44548 [2023-11-23 00:03:25,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:25,880 INFO L413 NwaCegarLoop]: 6269 mSDtfsCounter, 6152 mSDsluCounter, 6203 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6152 SdHoareTripleChecker+Valid, 12472 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:25,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6152 Valid, 12472 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 00:03:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44548 states. [2023-11-23 00:03:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44548 to 44445. [2023-11-23 00:03:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44445 states, 44343 states have (on average 1.7485736192860204) internal successors, (77537), 44442 states have internal predecessors, (77537), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44445 states to 44445 states and 77637 transitions. [2023-11-23 00:03:26,939 INFO L78 Accepts]: Start accepts. Automaton has 44445 states and 77637 transitions. Word has length 32 [2023-11-23 00:03:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:26,940 INFO L495 AbstractCegarLoop]: Abstraction has 44445 states and 77637 transitions. [2023-11-23 00:03:26,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44445 states and 77637 transitions. [2023-11-23 00:03:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 00:03:26,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:26,962 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] [2023-11-23 00:03:26,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 00:03:26,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:26,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1723514362, now seen corresponding path program 1 times [2023-11-23 00:03:26,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:26,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777726725] [2023-11-23 00:03:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:27,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:27,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777726725] [2023-11-23 00:03:27,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777726725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:27,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013546734] [2023-11-23 00:03:27,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:27,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 00:03:27,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 00:03:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:27,107 INFO L87 Difference]: Start difference. First operand 44445 states and 77637 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:31,036 INFO L93 Difference]: Finished difference Result 117487 states and 207239 transitions. [2023-11-23 00:03:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 00:03:31,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-23 00:03:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:31,171 INFO L225 Difference]: With dead ends: 117487 [2023-11-23 00:03:31,172 INFO L226 Difference]: Without dead ends: 73043 [2023-11-23 00:03:31,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:31,227 INFO L413 NwaCegarLoop]: 7492 mSDtfsCounter, 4602 mSDsluCounter, 4341 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4602 SdHoareTripleChecker+Valid, 11833 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:31,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4602 Valid, 11833 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2122 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-23 00:03:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73043 states. [2023-11-23 00:03:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73043 to 71237. [2023-11-23 00:03:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71237 states, 71135 states have (on average 1.7644900541224433) internal successors, (125517), 71234 states have internal predecessors, (125517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71237 states to 71237 states and 125617 transitions. [2023-11-23 00:03:32,604 INFO L78 Accepts]: Start accepts. Automaton has 71237 states and 125617 transitions. Word has length 33 [2023-11-23 00:03:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:32,606 INFO L495 AbstractCegarLoop]: Abstraction has 71237 states and 125617 transitions. [2023-11-23 00:03:32,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 71237 states and 125617 transitions. [2023-11-23 00:03:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 00:03:32,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:32,608 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] [2023-11-23 00:03:32,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 00:03:32,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:32,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1890025011, now seen corresponding path program 1 times [2023-11-23 00:03:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:32,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993636433] [2023-11-23 00:03:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:32,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:32,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:32,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993636433] [2023-11-23 00:03:32,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993636433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:32,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:32,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 00:03:32,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104731498] [2023-11-23 00:03:32,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:32,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 00:03:32,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:32,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 00:03:32,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:32,745 INFO L87 Difference]: Start difference. First operand 71237 states and 125617 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:33,883 INFO L93 Difference]: Finished difference Result 211059 states and 372227 transitions. [2023-11-23 00:03:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 00:03:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-23 00:03:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:34,156 INFO L225 Difference]: With dead ends: 211059 [2023-11-23 00:03:34,156 INFO L226 Difference]: Without dead ends: 139823 [2023-11-23 00:03:34,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:34,232 INFO L413 NwaCegarLoop]: 6341 mSDtfsCounter, 6022 mSDsluCounter, 6081 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6022 SdHoareTripleChecker+Valid, 12422 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:34,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6022 Valid, 12422 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 00:03:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139823 states. [2023-11-23 00:03:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139823 to 139717. [2023-11-23 00:03:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139717 states, 139615 states have (on average 1.7637001754825772) internal successors, (246239), 139714 states have internal predecessors, (246239), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139717 states to 139717 states and 246339 transitions. [2023-11-23 00:03:36,445 INFO L78 Accepts]: Start accepts. Automaton has 139717 states and 246339 transitions. Word has length 34 [2023-11-23 00:03:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:36,445 INFO L495 AbstractCegarLoop]: Abstraction has 139717 states and 246339 transitions. [2023-11-23 00:03:36,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 139717 states and 246339 transitions. [2023-11-23 00:03:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 00:03:36,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:36,448 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] [2023-11-23 00:03:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 00:03:36,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:36,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -363755687, now seen corresponding path program 1 times [2023-11-23 00:03:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:36,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654582142] [2023-11-23 00:03:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:36,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654582142] [2023-11-23 00:03:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654582142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:36,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330368530] [2023-11-23 00:03:36,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 00:03:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 00:03:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:36,635 INFO L87 Difference]: Start difference. First operand 139717 states and 246339 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:45,473 INFO L93 Difference]: Finished difference Result 320728 states and 565298 transitions. [2023-11-23 00:03:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 00:03:45,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-23 00:03:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:45,858 INFO L225 Difference]: With dead ends: 320728 [2023-11-23 00:03:45,859 INFO L226 Difference]: Without dead ends: 181012 [2023-11-23 00:03:45,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:45,942 INFO L413 NwaCegarLoop]: 7246 mSDtfsCounter, 4578 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 6649 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4578 SdHoareTripleChecker+Valid, 10904 SdHoareTripleChecker+Invalid, 7066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 6649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:45,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4578 Valid, 10904 Invalid, 7066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 6649 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-23 00:03:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181012 states. [2023-11-23 00:03:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181012 to 169005. [2023-11-23 00:03:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169005 states, 168903 states have (on average 1.7477427872802733) internal successors, (295199), 169002 states have internal predecessors, (295199), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169005 states to 169005 states and 295299 transitions. [2023-11-23 00:03:48,313 INFO L78 Accepts]: Start accepts. Automaton has 169005 states and 295299 transitions. Word has length 35 [2023-11-23 00:03:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:48,313 INFO L495 AbstractCegarLoop]: Abstraction has 169005 states and 295299 transitions. [2023-11-23 00:03:48,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 169005 states and 295299 transitions. [2023-11-23 00:03:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 00:03:48,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:48,316 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] [2023-11-23 00:03:48,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 00:03:48,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:48,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash 435359762, now seen corresponding path program 1 times [2023-11-23 00:03:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:48,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756417817] [2023-11-23 00:03:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:48,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:48,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756417817] [2023-11-23 00:03:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756417817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:48,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:48,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248331907] [2023-11-23 00:03:48,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:48,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 00:03:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 00:03:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:48,394 INFO L87 Difference]: Start difference. First operand 169005 states and 295299 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:53,939 INFO L93 Difference]: Finished difference Result 400143 states and 701995 transitions. [2023-11-23 00:03:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 00:03:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-23 00:03:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:54,323 INFO L225 Difference]: With dead ends: 400143 [2023-11-23 00:03:54,323 INFO L226 Difference]: Without dead ends: 231139 [2023-11-23 00:03:54,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 00:03:54,401 INFO L413 NwaCegarLoop]: 9865 mSDtfsCounter, 4487 mSDsluCounter, 4415 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4487 SdHoareTripleChecker+Valid, 14280 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:54,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4487 Valid, 14280 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 1861 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-23 00:03:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231139 states. [2023-11-23 00:03:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231139 to 222161. [2023-11-23 00:03:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222161 states, 222059 states have (on average 1.7473464259498601) internal successors, (388014), 222158 states have internal predecessors, (388014), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222161 states to 222161 states and 388114 transitions. [2023-11-23 00:03:57,856 INFO L78 Accepts]: Start accepts. Automaton has 222161 states and 388114 transitions. Word has length 36 [2023-11-23 00:03:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:57,857 INFO L495 AbstractCegarLoop]: Abstraction has 222161 states and 388114 transitions. [2023-11-23 00:03:57,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 00:03:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 222161 states and 388114 transitions. [2023-11-23 00:03:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 00:03:57,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:57,859 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] [2023-11-23 00:03:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 00:03:57,859 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:57,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1681936853, now seen corresponding path program 1 times [2023-11-23 00:03:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:57,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958342984] [2023-11-23 00:03:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:03:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:03:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:58,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958342984] [2023-11-23 00:03:58,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958342984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:03:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:03:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 00:03:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446033104] [2023-11-23 00:03:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:03:58,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 00:03:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 00:03:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:03:58,095 INFO L87 Difference]: Start difference. First operand 222161 states and 388114 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)