./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/eca-rers2018/Problem10.c --full-output --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/Problem10.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 aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 19:06:47,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 19:06:47,440 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 19:06:47,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 19:06:47,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 19:06:47,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 19:06:47,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 19:06:47,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 19:06:47,481 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 19:06:47,485 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 19:06:47,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 19:06:47,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 19:06:47,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 19:06:47,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 19:06:47,487 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 19:06:47,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 19:06:47,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 19:06:47,488 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 19:06:47,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 19:06:47,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 19:06:47,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 19:06:47,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 19:06:47,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 19:06:47,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 19:06:47,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 19:06:47,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 19:06:47,490 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 19:06:47,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 19:06:47,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 19:06:47,491 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 19:06:47,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 19:06:47,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:06:47,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 19:06:47,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 19:06:47,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 19:06:47,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 19:06:47,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 19:06:47,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 19:06:47,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 19:06:47,494 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 19:06:47,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 19:06:47,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 19:06:47,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2023-11-22 19:06:47,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 19:06:47,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 19:06:47,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 19:06:47,731 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 19:06:47,732 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 19:06:47,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2018/Problem10.c [2023-11-22 19:06:48,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 19:06:49,057 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 19:06:49,058 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem10.c [2023-11-22 19:06:49,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e6c51e3/f9b72930b222464fa52699e16ee1a619/FLAG0e1e830ff [2023-11-22 19:06:49,088 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e6c51e3/f9b72930b222464fa52699e16ee1a619 [2023-11-22 19:06:49,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 19:06:49,092 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 19:06:49,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 19:06:49,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 19:06:49,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 19:06:49,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b25197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49, skipping insertion in model container [2023-11-22 19:06:49,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,147 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 19:06:49,292 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/Problem10.c[778,791] [2023-11-22 19:06:49,296 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/Problem10.c[817,830] [2023-11-22 19:06:49,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:06:49,576 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 19:06:49,589 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/Problem10.c[778,791] [2023-11-22 19:06:49,589 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/Problem10.c[817,830] [2023-11-22 19:06:49,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:06:49,724 INFO L206 MainTranslator]: Completed translation [2023-11-22 19:06:49,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49 WrapperNode [2023-11-22 19:06:49,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 19:06:49,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 19:06:49,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 19:06:49,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 19:06:49,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,833 INFO L138 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 866 [2023-11-22 19:06:49,834 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 19:06:49,834 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 19:06:49,834 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 19:06:49,835 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 19:06:49,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,854 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,884 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-22 19:06:49,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,884 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,943 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 19:06:49,944 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 19:06:49,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 19:06:49,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 19:06:49,945 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (1/1) ... [2023-11-22 19:06:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:06:49,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:06:50,006 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) [2023-11-22 19:06:50,013 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 [2023-11-22 19:06:50,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 19:06:50,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2023-11-22 19:06:50,053 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2023-11-22 19:06:50,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2023-11-22 19:06:50,053 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2023-11-22 19:06:50,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 19:06:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 19:06:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 19:06:50,146 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 19:06:50,148 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 19:06:50,950 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 19:06:51,000 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 19:06:51,000 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 19:06:51,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:06:51 BoogieIcfgContainer [2023-11-22 19:06:51,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 19:06:51,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 19:06:51,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 19:06:51,005 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 19:06:51,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:06:49" (1/3) ... [2023-11-22 19:06:51,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501a8964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:06:51, skipping insertion in model container [2023-11-22 19:06:51,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:49" (2/3) ... [2023-11-22 19:06:51,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501a8964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:06:51, skipping insertion in model container [2023-11-22 19:06:51,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:06:51" (3/3) ... [2023-11-22 19:06:51,008 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10.c [2023-11-22 19:06:51,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 19:06:51,023 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-22 19:06:51,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 19:06:51,074 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;@6ba944f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 19:06:51,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-22 19:06:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 463 states, 358 states have (on average 1.600558659217877) internal successors, (573), 360 states have internal predecessors, (573), 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) [2023-11-22 19:06:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 19:06:51,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:51,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:06:51,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:51,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:51,093 INFO L85 PathProgramCache]: Analyzing trace with hash -973882549, now seen corresponding path program 1 times [2023-11-22 19:06:51,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:51,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351393563] [2023-11-22 19:06:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:51,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351393563] [2023-11-22 19:06:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351393563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:51,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:51,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588348313] [2023-11-22 19:06:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:51,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:06:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:06:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:06:51,423 INFO L87 Difference]: Start difference. First operand has 463 states, 358 states have (on average 1.600558659217877) internal successors, (573), 360 states have internal predecessors, (573), 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) [2023-11-22 19:06:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:52,255 INFO L93 Difference]: Finished difference Result 1154 states and 2058 transitions. [2023-11-22 19:06:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:06:52,257 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 [2023-11-22 19:06:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:52,272 INFO L225 Difference]: With dead ends: 1154 [2023-11-22 19:06:52,273 INFO L226 Difference]: Without dead ends: 686 [2023-11-22 19:06:52,279 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 [2023-11-22 19:06:52,282 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 570 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:52,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 639 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 19:06:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-22 19:06:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 554. [2023-11-22 19:06:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 452 states have (on average 1.592920353982301) internal successors, (720), 551 states have internal predecessors, (720), 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) [2023-11-22 19:06:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 820 transitions. [2023-11-22 19:06:52,374 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 820 transitions. Word has length 12 [2023-11-22 19:06:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:52,374 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 820 transitions. [2023-11-22 19:06:52,374 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) [2023-11-22 19:06:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 820 transitions. [2023-11-22 19:06:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 19:06:52,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:52,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:06:52,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 19:06:52,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:52,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1176212298, now seen corresponding path program 1 times [2023-11-22 19:06:52,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:52,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792676129] [2023-11-22 19:06:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:52,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:52,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792676129] [2023-11-22 19:06:52,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792676129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:52,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:52,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979179299] [2023-11-22 19:06:52,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:52,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:06:52,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:06:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:06:52,473 INFO L87 Difference]: Start difference. First operand 554 states and 820 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-22 19:06:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:53,007 INFO L93 Difference]: Finished difference Result 1696 states and 2574 transitions. [2023-11-22 19:06:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:06:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 20 [2023-11-22 19:06:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:53,011 INFO L225 Difference]: With dead ends: 1696 [2023-11-22 19:06:53,011 INFO L226 Difference]: Without dead ends: 1143 [2023-11-22 19:06:53,014 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 [2023-11-22 19:06:53,015 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 855 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:53,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1108 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 19:06:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-11-22 19:06:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 883. [2023-11-22 19:06:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 781 states have (on average 1.555697823303457) internal successors, (1215), 880 states have internal predecessors, (1215), 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) [2023-11-22 19:06:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1315 transitions. [2023-11-22 19:06:53,054 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1315 transitions. Word has length 20 [2023-11-22 19:06:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:53,055 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1315 transitions. [2023-11-22 19:06:53,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-22 19:06:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1315 transitions. [2023-11-22 19:06:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 19:06:53,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:53,060 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] [2023-11-22 19:06:53,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 19:06:53,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:53,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 388531602, now seen corresponding path program 1 times [2023-11-22 19:06:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307019454] [2023-11-22 19:06:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:53,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:53,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307019454] [2023-11-22 19:06:53,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307019454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:53,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:53,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781735570] [2023-11-22 19:06:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:53,245 INFO L87 Difference]: Start difference. First operand 883 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2023-11-22 19:06:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:53,272 INFO L93 Difference]: Finished difference Result 1766 states and 2630 transitions. [2023-11-22 19:06:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 23 [2023-11-22 19:06:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:53,274 INFO L225 Difference]: With dead ends: 1766 [2023-11-22 19:06:53,275 INFO L226 Difference]: Without dead ends: 884 [2023-11-22 19:06:53,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:53,276 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 3 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:53,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1119 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:06:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2023-11-22 19:06:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 883. [2023-11-22 19:06:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 781 states have (on average 1.5544174135723432) internal successors, (1214), 880 states have internal predecessors, (1214), 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) [2023-11-22 19:06:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1314 transitions. [2023-11-22 19:06:53,291 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1314 transitions. Word has length 23 [2023-11-22 19:06:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:53,291 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1314 transitions. [2023-11-22 19:06:53,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2023-11-22 19:06:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1314 transitions. [2023-11-22 19:06:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 19:06:53,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:53,292 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] [2023-11-22 19:06:53,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 19:06:53,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:53,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:53,293 INFO L85 PathProgramCache]: Analyzing trace with hash 646697040, now seen corresponding path program 1 times [2023-11-22 19:06:53,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:53,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242476357] [2023-11-22 19:06:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242476357] [2023-11-22 19:06:53,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242476357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:53,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965127771] [2023-11-22 19:06:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:53,321 INFO L87 Difference]: Start difference. First operand 883 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2023-11-22 19:06:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:53,457 INFO L93 Difference]: Finished difference Result 2190 states and 3254 transitions. [2023-11-22 19:06:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:53,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 23 [2023-11-22 19:06:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:53,461 INFO L225 Difference]: With dead ends: 2190 [2023-11-22 19:06:53,461 INFO L226 Difference]: Without dead ends: 1308 [2023-11-22 19:06:53,463 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 [2023-11-22 19:06:53,463 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 532 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:53,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1373 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:06:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-11-22 19:06:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1224. [2023-11-22 19:06:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1122 states have (on average 1.552584670231729) internal successors, (1742), 1221 states have internal predecessors, (1742), 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) [2023-11-22 19:06:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1842 transitions. [2023-11-22 19:06:53,483 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1842 transitions. Word has length 23 [2023-11-22 19:06:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:53,483 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1842 transitions. [2023-11-22 19:06:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2023-11-22 19:06:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1842 transitions. [2023-11-22 19:06:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 19:06:53,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:53,484 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] [2023-11-22 19:06:53,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 19:06:53,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:53,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash -198274412, now seen corresponding path program 1 times [2023-11-22 19:06:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:53,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279605757] [2023-11-22 19:06:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:53,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279605757] [2023-11-22 19:06:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279605757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:53,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:53,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145433426] [2023-11-22 19:06:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:53,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:53,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:53,541 INFO L87 Difference]: Start difference. First operand 1224 states and 1842 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2023-11-22 19:06:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:53,912 INFO L93 Difference]: Finished difference Result 3151 states and 4814 transitions. [2023-11-22 19:06:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 23 [2023-11-22 19:06:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:53,928 INFO L225 Difference]: With dead ends: 3151 [2023-11-22 19:06:53,929 INFO L226 Difference]: Without dead ends: 1928 [2023-11-22 19:06:53,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:53,931 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 309 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:53,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 792 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:06:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2023-11-22 19:06:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1390. [2023-11-22 19:06:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1288 states have (on average 1.454192546583851) internal successors, (1873), 1387 states have internal predecessors, (1873), 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) [2023-11-22 19:06:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1973 transitions. [2023-11-22 19:06:53,955 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1973 transitions. Word has length 23 [2023-11-22 19:06:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:53,955 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1973 transitions. [2023-11-22 19:06:53,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2023-11-22 19:06:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1973 transitions. [2023-11-22 19:06:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 19:06:53,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:53,956 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] [2023-11-22 19:06:53,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 19:06:53,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:53,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash 502790166, now seen corresponding path program 1 times [2023-11-22 19:06:53,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:53,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798130157] [2023-11-22 19:06:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:53,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798130157] [2023-11-22 19:06:53,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798130157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:53,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:06:53,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563698639] [2023-11-22 19:06:53,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:53,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:53,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:53,982 INFO L87 Difference]: Start difference. First operand 1390 states and 1973 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2023-11-22 19:06:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:54,068 INFO L93 Difference]: Finished difference Result 4121 states and 5861 transitions. [2023-11-22 19:06:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 23 [2023-11-22 19:06:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:54,076 INFO L225 Difference]: With dead ends: 4121 [2023-11-22 19:06:54,076 INFO L226 Difference]: Without dead ends: 2732 [2023-11-22 19:06:54,079 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 [2023-11-22 19:06:54,079 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 509 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:54,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1067 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:06:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2023-11-22 19:06:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2644. [2023-11-22 19:06:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2542 states have (on average 1.43705743509048) internal successors, (3653), 2641 states have internal predecessors, (3653), 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) [2023-11-22 19:06:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3753 transitions. [2023-11-22 19:06:54,118 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3753 transitions. Word has length 23 [2023-11-22 19:06:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:54,119 INFO L495 AbstractCegarLoop]: Abstraction has 2644 states and 3753 transitions. [2023-11-22 19:06:54,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2023-11-22 19:06:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3753 transitions. [2023-11-22 19:06:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 19:06:54,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:54,120 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] [2023-11-22 19:06:54,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 19:06:54,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1594090992, now seen corresponding path program 1 times [2023-11-22 19:06:54,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:54,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144723139] [2023-11-22 19:06:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:54,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144723139] [2023-11-22 19:06:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144723139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:54,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:54,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:54,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193204574] [2023-11-22 19:06:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:54,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:54,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:54,143 INFO L87 Difference]: Start difference. First operand 2644 states and 3753 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-22 19:06:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:54,521 INFO L93 Difference]: Finished difference Result 6112 states and 8877 transitions. [2023-11-22 19:06:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 24 [2023-11-22 19:06:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:54,531 INFO L225 Difference]: With dead ends: 6112 [2023-11-22 19:06:54,531 INFO L226 Difference]: Without dead ends: 3469 [2023-11-22 19:06:54,535 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 [2023-11-22 19:06:54,535 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 229 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:54,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 713 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:06:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2023-11-22 19:06:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3465. [2023-11-22 19:06:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3363 states have (on average 1.376746952126078) internal successors, (4630), 3462 states have internal predecessors, (4630), 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) [2023-11-22 19:06:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 4730 transitions. [2023-11-22 19:06:54,616 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 4730 transitions. Word has length 24 [2023-11-22 19:06:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:54,616 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 4730 transitions. [2023-11-22 19:06:54,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-22 19:06:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 4730 transitions. [2023-11-22 19:06:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 19:06:54,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:54,617 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] [2023-11-22 19:06:54,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 19:06:54,618 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:54,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1855904852, now seen corresponding path program 1 times [2023-11-22 19:06:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696758495] [2023-11-22 19:06:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:54,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:54,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696758495] [2023-11-22 19:06:54,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696758495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:54,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:54,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:54,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531425586] [2023-11-22 19:06:54,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:54,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:54,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:54,641 INFO L87 Difference]: Start difference. First operand 3465 states and 4730 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-22 19:06:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:55,026 INFO L93 Difference]: Finished difference Result 7770 states and 10847 transitions. [2023-11-22 19:06:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 24 [2023-11-22 19:06:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:55,038 INFO L225 Difference]: With dead ends: 7770 [2023-11-22 19:06:55,038 INFO L226 Difference]: Without dead ends: 4306 [2023-11-22 19:06:55,043 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 [2023-11-22 19:06:55,044 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 298 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:55,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 673 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:06:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2023-11-22 19:06:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 4302. [2023-11-22 19:06:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 4200 states have (on average 1.355952380952381) internal successors, (5695), 4299 states have internal predecessors, (5695), 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) [2023-11-22 19:06:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 5795 transitions. [2023-11-22 19:06:55,104 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 5795 transitions. Word has length 24 [2023-11-22 19:06:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:55,105 INFO L495 AbstractCegarLoop]: Abstraction has 4302 states and 5795 transitions. [2023-11-22 19:06:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-22 19:06:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 5795 transitions. [2023-11-22 19:06:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 19:06:55,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:55,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:06:55,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 19:06:55,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:55,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2122076635, now seen corresponding path program 1 times [2023-11-22 19:06:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:55,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060005557] [2023-11-22 19:06:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:55,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:55,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060005557] [2023-11-22 19:06:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060005557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:55,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:55,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:55,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894709984] [2023-11-22 19:06:55,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:55,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:55,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:55,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:55,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:55,131 INFO L87 Difference]: Start difference. First operand 4302 states and 5795 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-11-22 19:06:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:55,208 INFO L93 Difference]: Finished difference Result 8500 states and 11460 transitions. [2023-11-22 19:06:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 25 [2023-11-22 19:06:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:55,240 INFO L225 Difference]: With dead ends: 8500 [2023-11-22 19:06:55,240 INFO L226 Difference]: Without dead ends: 8493 [2023-11-22 19:06:55,243 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 [2023-11-22 19:06:55,244 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 547 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:55,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1546 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:06:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2023-11-22 19:06:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 8392. [2023-11-22 19:06:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8290 states have (on average 1.351266586248492) internal successors, (11202), 8389 states have internal predecessors, (11202), 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) [2023-11-22 19:06:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 11302 transitions. [2023-11-22 19:06:55,360 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 11302 transitions. Word has length 25 [2023-11-22 19:06:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:55,360 INFO L495 AbstractCegarLoop]: Abstraction has 8392 states and 11302 transitions. [2023-11-22 19:06:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-11-22 19:06:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 11302 transitions. [2023-11-22 19:06:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 19:06:55,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:55,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:06:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 19:06:55,361 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:55,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1697765399, now seen corresponding path program 1 times [2023-11-22 19:06:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:55,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448015509] [2023-11-22 19:06:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448015509] [2023-11-22 19:06:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448015509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:06:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39056748] [2023-11-22 19:06:55,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:55,385 INFO L87 Difference]: Start difference. First operand 8392 states and 11302 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2023-11-22 19:06:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:55,475 INFO L93 Difference]: Finished difference Result 16882 states and 22700 transitions. [2023-11-22 19:06:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 25 [2023-11-22 19:06:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:55,491 INFO L225 Difference]: With dead ends: 16882 [2023-11-22 19:06:55,491 INFO L226 Difference]: Without dead ends: 8491 [2023-11-22 19:06:55,502 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 [2023-11-22 19:06:55,503 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 532 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:55,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1203 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:06:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2023-11-22 19:06:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8390. [2023-11-22 19:06:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 8290 states have (on average 1.3462002412545235) internal successors, (11160), 8387 states have internal predecessors, (11160), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:06:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 11258 transitions. [2023-11-22 19:06:55,674 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 11258 transitions. Word has length 25 [2023-11-22 19:06:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:55,674 INFO L495 AbstractCegarLoop]: Abstraction has 8390 states and 11258 transitions. [2023-11-22 19:06:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2023-11-22 19:06:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 11258 transitions. [2023-11-22 19:06:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 19:06:55,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:55,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:06:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 19:06:55,676 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:55,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -816320605, now seen corresponding path program 1 times [2023-11-22 19:06:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547373612] [2023-11-22 19:06:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:55,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:55,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547373612] [2023-11-22 19:06:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547373612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:55,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:55,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:06:55,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974914017] [2023-11-22 19:06:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:55,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:55,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:55,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:55,702 INFO L87 Difference]: Start difference. First operand 8390 states and 11258 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 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) [2023-11-22 19:06:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:55,814 INFO L93 Difference]: Finished difference Result 24997 states and 33577 transitions. [2023-11-22 19:06:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 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 27 [2023-11-22 19:06:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:55,838 INFO L225 Difference]: With dead ends: 24997 [2023-11-22 19:06:55,839 INFO L226 Difference]: Without dead ends: 16608 [2023-11-22 19:06:55,853 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 [2023-11-22 19:06:55,854 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 525 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:55,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1102 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:06:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16608 states. [2023-11-22 19:06:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16608 to 16510. [2023-11-22 19:06:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16510 states, 16410 states have (on average 1.3410115783059111) internal successors, (22006), 16507 states have internal predecessors, (22006), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:06:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16510 states to 16510 states and 22104 transitions. [2023-11-22 19:06:56,090 INFO L78 Accepts]: Start accepts. Automaton has 16510 states and 22104 transitions. Word has length 27 [2023-11-22 19:06:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:56,090 INFO L495 AbstractCegarLoop]: Abstraction has 16510 states and 22104 transitions. [2023-11-22 19:06:56,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 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) [2023-11-22 19:06:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 16510 states and 22104 transitions. [2023-11-22 19:06:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 19:06:56,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:56,091 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] [2023-11-22 19:06:56,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 19:06:56,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:56,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 682758120, now seen corresponding path program 1 times [2023-11-22 19:06:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497308812] [2023-11-22 19:06:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:56,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:56,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497308812] [2023-11-22 19:06:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497308812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:56,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909163628] [2023-11-22 19:06:56,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:56,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:56,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:56,116 INFO L87 Difference]: Start difference. First operand 16510 states and 22104 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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) [2023-11-22 19:06:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:56,407 INFO L93 Difference]: Finished difference Result 47949 states and 64443 transitions. [2023-11-22 19:06:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 [2023-11-22 19:06:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:56,454 INFO L225 Difference]: With dead ends: 47949 [2023-11-22 19:06:56,455 INFO L226 Difference]: Without dead ends: 31440 [2023-11-22 19:06:56,472 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 [2023-11-22 19:06:56,473 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 503 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:56,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1343 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:06:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31440 states. [2023-11-22 19:06:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31440 to 31351. [2023-11-22 19:06:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31351 states, 31251 states have (on average 1.3338133179738247) internal successors, (41683), 31348 states have internal predecessors, (41683), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:06:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31351 states to 31351 states and 41781 transitions. [2023-11-22 19:06:57,027 INFO L78 Accepts]: Start accepts. Automaton has 31351 states and 41781 transitions. Word has length 32 [2023-11-22 19:06:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:57,027 INFO L495 AbstractCegarLoop]: Abstraction has 31351 states and 41781 transitions. [2023-11-22 19:06:57,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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) [2023-11-22 19:06:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 31351 states and 41781 transitions. [2023-11-22 19:06:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-22 19:06:57,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:57,028 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] [2023-11-22 19:06:57,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-22 19:06:57,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:57,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1918149547, now seen corresponding path program 1 times [2023-11-22 19:06:57,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:57,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319527146] [2023-11-22 19:06:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:57,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:57,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319527146] [2023-11-22 19:06:57,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319527146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:57,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:57,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:57,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304651382] [2023-11-22 19:06:57,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:57,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:57,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:57,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:57,055 INFO L87 Difference]: Start difference. First operand 31351 states and 41781 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) [2023-11-22 19:06:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:57,456 INFO L93 Difference]: Finished difference Result 72726 states and 96960 transitions. [2023-11-22 19:06:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:57,456 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 [2023-11-22 19:06:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:57,522 INFO L225 Difference]: With dead ends: 72726 [2023-11-22 19:06:57,523 INFO L226 Difference]: Without dead ends: 41376 [2023-11-22 19:06:57,546 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 [2023-11-22 19:06:57,547 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 481 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:57,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 959 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:06:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41376 states. [2023-11-22 19:06:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41376 to 41294. [2023-11-22 19:06:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41294 states, 41194 states have (on average 1.3173277661795406) internal successors, (54266), 41291 states have internal predecessors, (54266), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:06:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41294 states to 41294 states and 54364 transitions. [2023-11-22 19:06:58,224 INFO L78 Accepts]: Start accepts. Automaton has 41294 states and 54364 transitions. Word has length 33 [2023-11-22 19:06:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:06:58,224 INFO L495 AbstractCegarLoop]: Abstraction has 41294 states and 54364 transitions. [2023-11-22 19:06:58,224 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) [2023-11-22 19:06:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 41294 states and 54364 transitions. [2023-11-22 19:06:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 19:06:58,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:06:58,225 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] [2023-11-22 19:06:58,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-22 19:06:58,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:06:58,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:06:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1695664578, now seen corresponding path program 1 times [2023-11-22 19:06:58,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:06:58,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211179103] [2023-11-22 19:06:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:06:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:06:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:06:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:06:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:06:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211179103] [2023-11-22 19:06:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211179103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:06:58,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:06:58,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:06:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134013782] [2023-11-22 19:06:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:06:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:06:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:06:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:06:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:06:58,260 INFO L87 Difference]: Start difference. First operand 41294 states and 54364 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) 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) [2023-11-22 19:06:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:06:58,773 INFO L93 Difference]: Finished difference Result 104785 states and 137715 transitions. [2023-11-22 19:06:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:06:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) 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) Word has length 39 [2023-11-22 19:06:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:06:58,893 INFO L225 Difference]: With dead ends: 104785 [2023-11-22 19:06:58,893 INFO L226 Difference]: Without dead ends: 63492 [2023-11-22 19:06:58,931 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 [2023-11-22 19:06:58,931 INFO L413 NwaCegarLoop]: 974 mSDtfsCounter, 439 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:06:58,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1436 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:06:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63492 states. [2023-11-22 19:06:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63492 to 59564. [2023-11-22 19:06:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59564 states, 59464 states have (on average 1.2840542176779228) internal successors, (76355), 59561 states have internal predecessors, (76355), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59564 states to 59564 states and 76453 transitions. [2023-11-22 19:07:00,179 INFO L78 Accepts]: Start accepts. Automaton has 59564 states and 76453 transitions. Word has length 39 [2023-11-22 19:07:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:00,180 INFO L495 AbstractCegarLoop]: Abstraction has 59564 states and 76453 transitions. [2023-11-22 19:07:00,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) 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) [2023-11-22 19:07:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 59564 states and 76453 transitions. [2023-11-22 19:07:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 19:07:00,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:00,182 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] [2023-11-22 19:07:00,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-22 19:07:00,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 166601594, now seen corresponding path program 1 times [2023-11-22 19:07:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:00,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155904152] [2023-11-22 19:07:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:00,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:00,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155904152] [2023-11-22 19:07:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155904152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:00,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:07:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966847452] [2023-11-22 19:07:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:00,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:00,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:00,239 INFO L87 Difference]: Start difference. First operand 59564 states and 76453 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 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) [2023-11-22 19:07:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:00,919 INFO L93 Difference]: Finished difference Result 156090 states and 201786 transitions. [2023-11-22 19:07:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 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) Word has length 39 [2023-11-22 19:07:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:01,090 INFO L225 Difference]: With dead ends: 156090 [2023-11-22 19:07:01,090 INFO L226 Difference]: Without dead ends: 96527 [2023-11-22 19:07:01,114 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 [2023-11-22 19:07:01,115 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 449 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:01,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 978 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:07:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2023-11-22 19:07:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 96448. [2023-11-22 19:07:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96448 states, 96348 states have (on average 1.276445800639349) internal successors, (122983), 96445 states have internal predecessors, (122983), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96448 states to 96448 states and 123081 transitions. [2023-11-22 19:07:02,521 INFO L78 Accepts]: Start accepts. Automaton has 96448 states and 123081 transitions. Word has length 39 [2023-11-22 19:07:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:02,521 INFO L495 AbstractCegarLoop]: Abstraction has 96448 states and 123081 transitions. [2023-11-22 19:07:02,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 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) [2023-11-22 19:07:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 96448 states and 123081 transitions. [2023-11-22 19:07:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-22 19:07:02,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:02,527 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, 1, 1, 1, 1, 1] [2023-11-22 19:07:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-22 19:07:02,527 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:02,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -47031098, now seen corresponding path program 1 times [2023-11-22 19:07:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:02,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473384382] [2023-11-22 19:07:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:02,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473384382] [2023-11-22 19:07:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473384382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:02,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:02,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201942863] [2023-11-22 19:07:02,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:02,593 INFO L87 Difference]: Start difference. First operand 96448 states and 123081 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-22 19:07:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:03,127 INFO L93 Difference]: Finished difference Result 172891 states and 219988 transitions. [2023-11-22 19:07:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:03,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 44 [2023-11-22 19:07:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:03,796 INFO L225 Difference]: With dead ends: 172891 [2023-11-22 19:07:03,796 INFO L226 Difference]: Without dead ends: 172888 [2023-11-22 19:07:03,841 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 [2023-11-22 19:07:03,843 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 526 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:03,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1567 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172888 states. [2023-11-22 19:07:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172888 to 172668. [2023-11-22 19:07:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172668 states, 172568 states have (on average 1.2715393352185804) internal successors, (219427), 172665 states have internal predecessors, (219427), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172668 states to 172668 states and 219525 transitions. [2023-11-22 19:07:05,757 INFO L78 Accepts]: Start accepts. Automaton has 172668 states and 219525 transitions. Word has length 44 [2023-11-22 19:07:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:05,758 INFO L495 AbstractCegarLoop]: Abstraction has 172668 states and 219525 transitions. [2023-11-22 19:07:05,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-22 19:07:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 172668 states and 219525 transitions. [2023-11-22 19:07:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-22 19:07:05,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:05,759 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:05,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-22 19:07:05,759 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:05,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2000323693, now seen corresponding path program 1 times [2023-11-22 19:07:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:05,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869007344] [2023-11-22 19:07:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:05,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:05,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869007344] [2023-11-22 19:07:05,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869007344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:05,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:05,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:05,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912685700] [2023-11-22 19:07:05,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:05,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:05,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:05,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:07:05,789 INFO L87 Difference]: Start difference. First operand 172668 states and 219525 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-22 19:07:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:08,479 INFO L93 Difference]: Finished difference Result 451351 states and 573250 transitions. [2023-11-22 19:07:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:07:08,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 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 47 [2023-11-22 19:07:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:09,015 INFO L225 Difference]: With dead ends: 451351 [2023-11-22 19:07:09,016 INFO L226 Difference]: Without dead ends: 278684 [2023-11-22 19:07:09,109 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 [2023-11-22 19:07:09,117 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 862 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:09,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 717 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 19:07:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278684 states. [2023-11-22 19:07:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278684 to 172663. [2023-11-22 19:07:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172663 states, 172568 states have (on average 1.2614563534374854) internal successors, (217687), 172660 states have internal predecessors, (217687), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172663 states to 172663 states and 217780 transitions. [2023-11-22 19:07:12,109 INFO L78 Accepts]: Start accepts. Automaton has 172663 states and 217780 transitions. Word has length 47 [2023-11-22 19:07:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:12,110 INFO L495 AbstractCegarLoop]: Abstraction has 172663 states and 217780 transitions. [2023-11-22 19:07:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-22 19:07:12,110 INFO L276 IsEmpty]: Start isEmpty. Operand 172663 states and 217780 transitions. [2023-11-22 19:07:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 19:07:12,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:12,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:12,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-22 19:07:12,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:12,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1428399207, now seen corresponding path program 1 times [2023-11-22 19:07:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524267087] [2023-11-22 19:07:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:12,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524267087] [2023-11-22 19:07:12,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524267087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:12,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186138828] [2023-11-22 19:07:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:12,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:12,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:12,227 INFO L87 Difference]: Start difference. First operand 172663 states and 217780 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-22 19:07:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:13,999 INFO L93 Difference]: Finished difference Result 341099 states and 430506 transitions. [2023-11-22 19:07:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 57 [2023-11-22 19:07:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:14,283 INFO L225 Difference]: With dead ends: 341099 [2023-11-22 19:07:14,283 INFO L226 Difference]: Without dead ends: 168437 [2023-11-22 19:07:14,376 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 [2023-11-22 19:07:14,377 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:14,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 355 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:07:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168437 states. [2023-11-22 19:07:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168437 to 89205. [2023-11-22 19:07:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89205 states, 89110 states have (on average 1.2030972954774997) internal successors, (107208), 89202 states have internal predecessors, (107208), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89205 states to 89205 states and 107301 transitions. [2023-11-22 19:07:16,046 INFO L78 Accepts]: Start accepts. Automaton has 89205 states and 107301 transitions. Word has length 57 [2023-11-22 19:07:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:16,047 INFO L495 AbstractCegarLoop]: Abstraction has 89205 states and 107301 transitions. [2023-11-22 19:07:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-22 19:07:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 89205 states and 107301 transitions. [2023-11-22 19:07:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-22 19:07:16,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:16,048 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, 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, 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] [2023-11-22 19:07:16,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-22 19:07:16,048 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash -883141712, now seen corresponding path program 1 times [2023-11-22 19:07:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:16,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43578511] [2023-11-22 19:07:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:16,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:16,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43578511] [2023-11-22 19:07:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43578511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:16,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913634603] [2023-11-22 19:07:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:16,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:16,094 INFO L87 Difference]: Start difference. First operand 89205 states and 107301 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2023-11-22 19:07:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:16,854 INFO L93 Difference]: Finished difference Result 127428 states and 152501 transitions. [2023-11-22 19:07:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:16,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 112 [2023-11-22 19:07:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:17,049 INFO L225 Difference]: With dead ends: 127428 [2023-11-22 19:07:17,050 INFO L226 Difference]: Without dead ends: 127423 [2023-11-22 19:07:17,100 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 [2023-11-22 19:07:17,101 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 444 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:17,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1255 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2023-11-22 19:07:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 127210. [2023-11-22 19:07:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127210 states, 127115 states have (on average 1.1919757699720726) internal successors, (151518), 127207 states have internal predecessors, (151518), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127210 states to 127210 states and 151611 transitions. [2023-11-22 19:07:19,276 INFO L78 Accepts]: Start accepts. Automaton has 127210 states and 151611 transitions. Word has length 112 [2023-11-22 19:07:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:19,276 INFO L495 AbstractCegarLoop]: Abstraction has 127210 states and 151611 transitions. [2023-11-22 19:07:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2023-11-22 19:07:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 127210 states and 151611 transitions. [2023-11-22 19:07:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-22 19:07:19,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:19,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:19,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-22 19:07:19,281 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:19,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:19,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1720004066, now seen corresponding path program 1 times [2023-11-22 19:07:19,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:19,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097326467] [2023-11-22 19:07:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 19:07:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097326467] [2023-11-22 19:07:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097326467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:19,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:19,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68456802] [2023-11-22 19:07:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:19,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:19,407 INFO L87 Difference]: Start difference. First operand 127210 states and 151611 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-22 19:07:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:20,377 INFO L93 Difference]: Finished difference Result 273603 states and 330310 transitions. [2023-11-22 19:07:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:20,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 142 [2023-11-22 19:07:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:20,592 INFO L225 Difference]: With dead ends: 273603 [2023-11-22 19:07:20,592 INFO L226 Difference]: Without dead ends: 146514 [2023-11-22 19:07:21,045 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 [2023-11-22 19:07:21,046 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 321 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:21,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 512 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:07:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states. [2023-11-22 19:07:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146514 to 146206. [2023-11-22 19:07:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146206 states, 146111 states have (on average 1.1940237216910432) internal successors, (174460), 146203 states have internal predecessors, (174460), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146206 states to 146206 states and 174553 transitions. [2023-11-22 19:07:22,732 INFO L78 Accepts]: Start accepts. Automaton has 146206 states and 174553 transitions. Word has length 142 [2023-11-22 19:07:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:22,736 INFO L495 AbstractCegarLoop]: Abstraction has 146206 states and 174553 transitions. [2023-11-22 19:07:22,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-22 19:07:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 146206 states and 174553 transitions. [2023-11-22 19:07:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-22 19:07:22,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:22,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:22,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-22 19:07:22,738 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:22,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash 17048110, now seen corresponding path program 1 times [2023-11-22 19:07:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:22,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592611891] [2023-11-22 19:07:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:22,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 19:07:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592611891] [2023-11-22 19:07:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592611891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:23,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:23,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:23,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665116892] [2023-11-22 19:07:23,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:23,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:23,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:23,062 INFO L87 Difference]: Start difference. First operand 146206 states and 174553 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-22 19:07:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:25,302 INFO L93 Difference]: Finished difference Result 421121 states and 503082 transitions. [2023-11-22 19:07:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 144 [2023-11-22 19:07:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:25,680 INFO L225 Difference]: With dead ends: 421121 [2023-11-22 19:07:25,681 INFO L226 Difference]: Without dead ends: 275036 [2023-11-22 19:07:25,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:25,732 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 511 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:25,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 910 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 19:07:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275036 states. [2023-11-22 19:07:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275036 to 274849. [2023-11-22 19:07:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274849 states, 274754 states have (on average 1.1923830044330566) internal successors, (327612), 274846 states have internal predecessors, (327612), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274849 states to 274849 states and 327705 transitions. [2023-11-22 19:07:29,526 INFO L78 Accepts]: Start accepts. Automaton has 274849 states and 327705 transitions. Word has length 144 [2023-11-22 19:07:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:29,526 INFO L495 AbstractCegarLoop]: Abstraction has 274849 states and 327705 transitions. [2023-11-22 19:07:29,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-22 19:07:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 274849 states and 327705 transitions. [2023-11-22 19:07:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-22 19:07:29,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:29,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:29,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-22 19:07:29,528 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:29,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 260470623, now seen corresponding path program 1 times [2023-11-22 19:07:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180595609] [2023-11-22 19:07:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:29,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180595609] [2023-11-22 19:07:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180595609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:29,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:29,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 19:07:29,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612954517] [2023-11-22 19:07:29,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:07:29,596 INFO L87 Difference]: Start difference. First operand 274849 states and 327705 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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)