/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/eca-rers2018/Problem16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 05:03:52,849 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 05:03:52,938 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 05:03:52,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 05:03:52,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 05:03:52,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 05:03:52,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 05:03:52,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 05:03:52,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 05:03:52,977 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 05:03:52,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 05:03:52,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 05:03:52,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 05:03:52,980 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 05:03:52,980 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 05:03:52,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 05:03:52,981 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 05:03:52,981 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 05:03:52,981 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 05:03:52,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 05:03:52,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 05:03:52,982 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 05:03:52,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 05:03:52,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 05:03:52,983 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 05:03:52,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 05:03:52,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 05:03:52,983 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 05:03:52,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 05:03:52,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 05:03:52,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 05:03:52,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 05:03:52,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 05:03:52,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 05:03:52,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 05:03:52,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 05:03:52,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 05:03:52,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 05:03:52,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 05:03:52,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 05:03:52,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 05:03:52,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 05:03:52,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 05:03:52,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 05:03:53,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 05:03:53,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 05:03:53,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 05:03:53,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 05:03:53,255 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 05:03:53,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2018/Problem16.c [2023-12-19 05:03:54,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 05:03:57,831 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 05:03:57,832 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem16.c [2023-12-19 05:03:58,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59fdd8256/9b39a8e9047b464590ad3ed78e782b00/FLAG58be8a7dc [2023-12-19 05:03:58,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59fdd8256/9b39a8e9047b464590ad3ed78e782b00 [2023-12-19 05:03:58,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 05:03:58,481 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 05:03:58,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 05:03:58,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 05:03:58,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 05:03:58,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:03:58" (1/1) ... [2023-12-19 05:03:58,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37732b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:03:58, skipping insertion in model container [2023-12-19 05:03:58,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:03:58" (1/1) ... [2023-12-19 05:04:00,762 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 05:04:01,638 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem16.c[778,791] [2023-12-19 05:04:01,760 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem16.c[817,830] [2023-12-19 05:06:10,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 05:06:10,947 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 05:06:10,956 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem16.c[778,791] [2023-12-19 05:06:10,957 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem16.c[817,830] [2023-12-19 05:06:15,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 05:06:20,336 INFO L206 MainTranslator]: Completed translation [2023-12-19 05:06:20,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20 WrapperNode [2023-12-19 05:06:20,337 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 05:06:20,339 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 05:06:20,339 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 05:06:20,339 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 05:06:20,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:22,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:28,703 INFO L138 Inliner]: procedures = 1385, calls = 1376, calls flagged for inlining = 1272, calls inlined = 1272, statements flattened = 632996 [2023-12-19 05:06:28,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 05:06:28,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 05:06:28,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 05:06:28,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 05:06:28,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:28,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:29,643 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:31,276 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 05:06:31,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:31,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:35,013 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:35,562 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:36,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:36,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:38,152 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 05:06:38,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 05:06:38,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 05:06:38,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 05:06:38,177 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (1/1) ... [2023-12-19 05:06:38,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 05:06:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 05:06:38,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 05:06:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 05:06:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 05:06:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 05:06:38,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 05:06:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2023-12-19 05:06:38,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2023-12-19 05:06:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2023-12-19 05:06:38,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2023-12-19 05:06:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 05:06:39,326 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 05:06:39,328 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 05:08:02,634 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 05:08:02,804 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 05:08:02,805 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 05:08:02,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:08:02 BoogieIcfgContainer [2023-12-19 05:08:02,806 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 05:08:02,808 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 05:08:02,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 05:08:02,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 05:08:02,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:03:58" (1/3) ... [2023-12-19 05:08:02,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68010fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:08:02, skipping insertion in model container [2023-12-19 05:08:02,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:06:20" (2/3) ... [2023-12-19 05:08:02,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68010fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:08:02, skipping insertion in model container [2023-12-19 05:08:02,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:08:02" (3/3) ... [2023-12-19 05:08:02,815 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16.c [2023-12-19 05:08:02,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 05:08:02,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-19 05:08:03,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 05:08:03,157 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;@72d57e20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 05:08:03,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-19 05:08:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 8613 states, 8508 states have (on average 1.8506111894687354) internal successors, (15745), 8510 states have internal predecessors, (15745), 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) [2023-12-19 05:08:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-19 05:08:03,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:08:03,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 05:08:03,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:08:03,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:08:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1396961519, now seen corresponding path program 1 times [2023-12-19 05:08:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:08:03,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354002039] [2023-12-19 05:08:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:08:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:08:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:08:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:08:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:08:03,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354002039] [2023-12-19 05:08:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354002039] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:08:03,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:08:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 05:08:03,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079496900] [2023-12-19 05:08:03,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:08:03,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 05:08:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:08:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 05:08:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 05:08:03,979 INFO L87 Difference]: Start difference. First operand has 8613 states, 8508 states have (on average 1.8506111894687354) internal successors, (15745), 8510 states have internal predecessors, (15745), 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) [2023-12-19 05:08:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:08:20,827 INFO L93 Difference]: Finished difference Result 19842 states and 36825 transitions. [2023-12-19 05:08:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 05:08:20,833 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 [2023-12-19 05:08:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:08:20,886 INFO L225 Difference]: With dead ends: 19842 [2023-12-19 05:08:20,886 INFO L226 Difference]: Without dead ends: 11224 [2023-12-19 05:08:20,901 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 [2023-12-19 05:08:20,904 INFO L413 NwaCegarLoop]: 14948 mSDtfsCounter, 5496 mSDsluCounter, 10157 mSDsCounter, 0 mSdLazyCounter, 10498 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5496 SdHoareTripleChecker+Valid, 25105 SdHoareTripleChecker+Invalid, 10860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 10498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-12-19 05:08:20,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5496 Valid, 25105 Invalid, 10860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [362 Valid, 10498 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2023-12-19 05:08:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11224 states. [2023-12-19 05:08:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11224 to 10281. [2023-12-19 05:08:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10281 states, 10179 states have (on average 1.8513606444640927) internal successors, (18845), 10278 states have internal predecessors, (18845), 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) [2023-12-19 05:08:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10281 states to 10281 states and 18945 transitions. [2023-12-19 05:08:21,245 INFO L78 Accepts]: Start accepts. Automaton has 10281 states and 18945 transitions. Word has length 12 [2023-12-19 05:08:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:08:21,245 INFO L495 AbstractCegarLoop]: Abstraction has 10281 states and 18945 transitions. [2023-12-19 05:08:21,246 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) [2023-12-19 05:08:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10281 states and 18945 transitions. [2023-12-19 05:08:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-19 05:08:21,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:08:21,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 05:08:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 05:08:21,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:08:21,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:08:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1229885771, now seen corresponding path program 1 times [2023-12-19 05:08:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:08:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135533946] [2023-12-19 05:08:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:08:21,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:08:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:08:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:08:21,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:08:21,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135533946] [2023-12-19 05:08:21,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135533946] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:08:21,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:08:21,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 05:08:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261446507] [2023-12-19 05:08:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:08:21,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 05:08:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:08:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 05:08:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 05:08:21,806 INFO L87 Difference]: Start difference. First operand 10281 states and 18945 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-12-19 05:08:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:08:56,565 INFO L93 Difference]: Finished difference Result 28163 states and 51657 transitions. [2023-12-19 05:08:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 05:08:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 19 [2023-12-19 05:08:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:08:56,622 INFO L225 Difference]: With dead ends: 28163 [2023-12-19 05:08:56,622 INFO L226 Difference]: Without dead ends: 17883 [2023-12-19 05:08:56,635 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 [2023-12-19 05:08:56,636 INFO L413 NwaCegarLoop]: 18433 mSDtfsCounter, 8816 mSDsluCounter, 12971 mSDsCounter, 0 mSdLazyCounter, 33257 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8816 SdHoareTripleChecker+Valid, 31404 SdHoareTripleChecker+Invalid, 34409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 33257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.2s IncrementalHoareTripleChecker+Time [2023-12-19 05:08:56,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8816 Valid, 31404 Invalid, 34409 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1152 Valid, 33257 Invalid, 0 Unknown, 0 Unchecked, 34.2s Time] [2023-12-19 05:08:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17883 states. [2023-12-19 05:08:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17883 to 15287. [2023-12-19 05:08:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 15185 states have (on average 1.828580836351663) internal successors, (27767), 15284 states have internal predecessors, (27767), 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) [2023-12-19 05:08:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 27867 transitions. [2023-12-19 05:08:56,953 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 27867 transitions. Word has length 19 [2023-12-19 05:08:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:08:56,954 INFO L495 AbstractCegarLoop]: Abstraction has 15287 states and 27867 transitions. [2023-12-19 05:08:56,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-12-19 05:08:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 27867 transitions. [2023-12-19 05:08:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 05:08:56,960 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:08:56,960 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] [2023-12-19 05:08:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 05:08:56,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:08:56,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:08:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 32366642, now seen corresponding path program 1 times [2023-12-19 05:08:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:08:56,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777384862] [2023-12-19 05:08:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:08:56,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:08:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:08:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:08:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:08:57,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777384862] [2023-12-19 05:08:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777384862] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:08:57,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:08:57,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 05:08:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302303012] [2023-12-19 05:08:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:08:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 05:08:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:08:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 05:08:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 05:08:57,178 INFO L87 Difference]: Start difference. First operand 15287 states and 27867 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) [2023-12-19 05:08:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:08:58,310 INFO L93 Difference]: Finished difference Result 44332 states and 80773 transitions. [2023-12-19 05:08:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 05:08:58,311 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 [2023-12-19 05:08:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:08:58,372 INFO L225 Difference]: With dead ends: 44332 [2023-12-19 05:08:58,373 INFO L226 Difference]: Without dead ends: 29046 [2023-12-19 05:08:58,399 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 [2023-12-19 05:08:58,400 INFO L413 NwaCegarLoop]: 16232 mSDtfsCounter, 14908 mSDsluCounter, 15332 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14908 SdHoareTripleChecker+Valid, 31564 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 05:08:58,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14908 Valid, 31564 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 05:08:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29046 states. [2023-12-19 05:08:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29046 to 28938. [2023-12-19 05:08:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28938 states, 28836 states have (on average 1.8267443473435983) internal successors, (52676), 28935 states have internal predecessors, (52676), 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) [2023-12-19 05:08:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28938 states to 28938 states and 52776 transitions. [2023-12-19 05:08:58,897 INFO L78 Accepts]: Start accepts. Automaton has 28938 states and 52776 transitions. Word has length 32 [2023-12-19 05:08:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:08:58,898 INFO L495 AbstractCegarLoop]: Abstraction has 28938 states and 52776 transitions. [2023-12-19 05:08:58,898 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) [2023-12-19 05:08:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 28938 states and 52776 transitions. [2023-12-19 05:08:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-19 05:08:58,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:08:58,900 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] [2023-12-19 05:08:58,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 05:08:58,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:08:58,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:08:58,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1062471948, now seen corresponding path program 1 times [2023-12-19 05:08:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:08:58,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073407832] [2023-12-19 05:08:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:08:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:08:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:08:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:08:59,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:08:59,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073407832] [2023-12-19 05:08:59,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073407832] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:08:59,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:08:59,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 05:08:59,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284444391] [2023-12-19 05:08:59,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:08:59,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 05:08:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:08:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 05:08:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 05:08:59,266 INFO L87 Difference]: Start difference. First operand 28938 states and 52776 transitions. Second operand has 4 states, 4 states have (on average 8.0) 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) [2023-12-19 05:09:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:09:28,892 INFO L93 Difference]: Finished difference Result 73798 states and 134218 transitions. [2023-12-19 05:09:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 05:09:28,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) 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 [2023-12-19 05:09:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:09:28,999 INFO L225 Difference]: With dead ends: 73798 [2023-12-19 05:09:28,999 INFO L226 Difference]: Without dead ends: 44861 [2023-12-19 05:09:29,037 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 [2023-12-19 05:09:29,046 INFO L413 NwaCegarLoop]: 20214 mSDtfsCounter, 19012 mSDsluCounter, 11872 mSDsCounter, 0 mSdLazyCounter, 21786 mSolverCounterSat, 1417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19012 SdHoareTripleChecker+Valid, 32086 SdHoareTripleChecker+Invalid, 23203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1417 IncrementalHoareTripleChecker+Valid, 21786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2023-12-19 05:09:29,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19012 Valid, 32086 Invalid, 23203 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1417 Valid, 21786 Invalid, 0 Unknown, 0 Unchecked, 29.0s Time] [2023-12-19 05:09:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44861 states. [2023-12-19 05:09:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44861 to 39694. [2023-12-19 05:09:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39694 states, 39592 states have (on average 1.8135481915538492) internal successors, (71802), 39691 states have internal predecessors, (71802), 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) [2023-12-19 05:09:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39694 states to 39694 states and 71902 transitions. [2023-12-19 05:09:29,677 INFO L78 Accepts]: Start accepts. Automaton has 39694 states and 71902 transitions. Word has length 33 [2023-12-19 05:09:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:09:29,677 INFO L495 AbstractCegarLoop]: Abstraction has 39694 states and 71902 transitions. [2023-12-19 05:09:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) 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) [2023-12-19 05:09:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 39694 states and 71902 transitions. [2023-12-19 05:09:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 05:09:29,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:09:29,680 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] [2023-12-19 05:09:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 05:09:29,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:09:29,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:09:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 675749198, now seen corresponding path program 1 times [2023-12-19 05:09:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:09:29,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011886518] [2023-12-19 05:09:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:09:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:09:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:09:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:09:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:09:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011886518] [2023-12-19 05:09:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011886518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:09:29,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:09:29,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 05:09:29,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351380401] [2023-12-19 05:09:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:09:29,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 05:09:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:09:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 05:09:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 05:09:29,861 INFO L87 Difference]: Start difference. First operand 39694 states and 71902 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) [2023-12-19 05:09:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:09:32,433 INFO L93 Difference]: Finished difference Result 116802 states and 211471 transitions. [2023-12-19 05:09:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 05:09:32,433 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 [2023-12-19 05:09:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:09:32,657 INFO L225 Difference]: With dead ends: 116802 [2023-12-19 05:09:32,657 INFO L226 Difference]: Without dead ends: 77109 [2023-12-19 05:09:32,711 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 [2023-12-19 05:09:32,712 INFO L413 NwaCegarLoop]: 18298 mSDtfsCounter, 14824 mSDsluCounter, 14946 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14824 SdHoareTripleChecker+Valid, 33244 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-19 05:09:32,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14824 Valid, 33244 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-19 05:09:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77109 states. [2023-12-19 05:09:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77109 to 76947. [2023-12-19 05:09:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76947 states, 76845 states have (on average 1.810605764851324) internal successors, (139136), 76944 states have internal predecessors, (139136), 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) [2023-12-19 05:09:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76947 states to 76947 states and 139236 transitions. [2023-12-19 05:09:34,064 INFO L78 Accepts]: Start accepts. Automaton has 76947 states and 139236 transitions. Word has length 36 [2023-12-19 05:09:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:09:34,064 INFO L495 AbstractCegarLoop]: Abstraction has 76947 states and 139236 transitions. [2023-12-19 05:09:34,064 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) [2023-12-19 05:09:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 76947 states and 139236 transitions. [2023-12-19 05:09:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 05:09:34,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:09:34,068 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] [2023-12-19 05:09:34,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-19 05:09:34,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:09:34,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:09:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash -527285036, now seen corresponding path program 1 times [2023-12-19 05:09:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:09:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44650711] [2023-12-19 05:09:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:09:34,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:09:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:09:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:09:34,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:09:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44650711] [2023-12-19 05:09:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44650711] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:09:34,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:09:34,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 05:09:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983968007] [2023-12-19 05:09:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:09:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 05:09:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:09:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 05:09:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 05:09:34,256 INFO L87 Difference]: Start difference. First operand 76947 states and 139236 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2023-12-19 05:09:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:09:35,181 INFO L93 Difference]: Finished difference Result 153887 states and 278460 transitions. [2023-12-19 05:09:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 05:09:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 37 [2023-12-19 05:09:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:09:35,425 INFO L225 Difference]: With dead ends: 153887 [2023-12-19 05:09:35,425 INFO L226 Difference]: Without dead ends: 153884 [2023-12-19 05:09:35,748 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 [2023-12-19 05:09:35,752 INFO L413 NwaCegarLoop]: 15753 mSDtfsCounter, 15698 mSDsluCounter, 15725 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15698 SdHoareTripleChecker+Valid, 31478 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 05:09:35,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15698 Valid, 31478 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 05:09:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153884 states. [2023-12-19 05:09:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153884 to 153781. [2023-12-19 05:09:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153781 states, 153679 states have (on average 1.8105596730848066) internal successors, (278245), 153778 states have internal predecessors, (278245), 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) [2023-12-19 05:09:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153781 states to 153781 states and 278345 transitions. [2023-12-19 05:09:38,733 INFO L78 Accepts]: Start accepts. Automaton has 153781 states and 278345 transitions. Word has length 37 [2023-12-19 05:09:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:09:38,738 INFO L495 AbstractCegarLoop]: Abstraction has 153781 states and 278345 transitions. [2023-12-19 05:09:38,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2023-12-19 05:09:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 153781 states and 278345 transitions. [2023-12-19 05:09:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 05:09:38,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:09:38,768 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] [2023-12-19 05:09:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-19 05:09:38,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:09:38,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:09:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash -495128671, now seen corresponding path program 1 times [2023-12-19 05:09:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:09:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543691313] [2023-12-19 05:09:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:09:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:09:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:09:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:09:39,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:09:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543691313] [2023-12-19 05:09:39,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543691313] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:09:39,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:09:39,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 05:09:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198316518] [2023-12-19 05:09:39,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:09:39,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 05:09:39,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:09:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 05:09:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 05:09:39,112 INFO L87 Difference]: Start difference. First operand 153781 states and 278345 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2023-12-19 05:09:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:09:42,150 INFO L93 Difference]: Finished difference Result 458357 states and 829595 transitions. [2023-12-19 05:09:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 05:09:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 37 [2023-12-19 05:09:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:09:43,369 INFO L225 Difference]: With dead ends: 458357 [2023-12-19 05:09:43,369 INFO L226 Difference]: Without dead ends: 304577 [2023-12-19 05:09:43,526 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 [2023-12-19 05:09:43,532 INFO L413 NwaCegarLoop]: 15899 mSDtfsCounter, 15466 mSDsluCounter, 15622 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15466 SdHoareTripleChecker+Valid, 31521 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 05:09:43,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15466 Valid, 31521 Invalid, 144 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [34 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 05:09:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304577 states. [2023-12-19 05:09:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304577 to 304207. [2023-12-19 05:09:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304207 states, 304105 states have (on average 1.8107331349369462) internal successors, (550653), 304204 states have internal predecessors, (550653), 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) [2023-12-19 05:09:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304207 states to 304207 states and 550753 transitions. [2023-12-19 05:09:49,471 INFO L78 Accepts]: Start accepts. Automaton has 304207 states and 550753 transitions. Word has length 37 [2023-12-19 05:09:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 05:09:49,472 INFO L495 AbstractCegarLoop]: Abstraction has 304207 states and 550753 transitions. [2023-12-19 05:09:49,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2023-12-19 05:09:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 304207 states and 550753 transitions. [2023-12-19 05:09:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 05:09:49,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 05:09:49,481 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] [2023-12-19 05:09:49,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-19 05:09:49,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 05:09:49,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 05:09:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash 833366166, now seen corresponding path program 1 times [2023-12-19 05:09:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 05:09:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773639912] [2023-12-19 05:09:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 05:09:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 05:09:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 05:09:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 05:09:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 05:09:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773639912] [2023-12-19 05:09:49,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773639912] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 05:09:49,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 05:09:49,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 05:09:49,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341296338] [2023-12-19 05:09:49,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 05:09:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 05:09:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 05:09:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 05:09:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 05:09:49,801 INFO L87 Difference]: Start difference. First operand 304207 states and 550753 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2023-12-19 05:09:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 05:09:55,109 INFO L93 Difference]: Finished difference Result 909336 states and 1646270 transitions. [2023-12-19 05:09:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 05:09:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 38 [2023-12-19 05:09:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 05:09:57,304 INFO L225 Difference]: With dead ends: 909336 [2023-12-19 05:09:57,305 INFO L226 Difference]: Without dead ends: 605130 [2023-12-19 05:09:57,887 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 [2023-12-19 05:09:57,889 INFO L413 NwaCegarLoop]: 15839 mSDtfsCounter, 15552 mSDsluCounter, 15637 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15552 SdHoareTripleChecker+Valid, 31476 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 05:09:57,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15552 Valid, 31476 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 05:09:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605130 states.