./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.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 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 00:11:11,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 00:11:11,652 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 00:11:11,657 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 00:11:11,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 00:11:11,693 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 00:11:11,694 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 00:11:11,695 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 00:11:11,696 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 00:11:11,697 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 00:11:11,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 00:11:11,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 00:11:11,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 00:11:11,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 00:11:11,702 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 00:11:11,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 00:11:11,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 00:11:11,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 00:11:11,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 00:11:11,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 00:11:11,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 00:11:11,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 00:11:11,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 00:11:11,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 00:11:11,706 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 00:11:11,706 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 00:11:11,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 00:11:11,707 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 00:11:11,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 00:11:11,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 00:11:11,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 00:11:11,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 00:11:11,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 00:11:11,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 00:11:11,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 00:11:11,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 00:11:11,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 00:11:11,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 00:11:11,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 00:11:11,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 00:11:11,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 00:11:11,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 00:11:11,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2024-10-14 00:11:12,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 00:11:12,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 00:11:12,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 00:11:12,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 00:11:12,048 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 00:11:12,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c [2024-10-14 00:11:13,563 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 00:11:13,993 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 00:11:13,994 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c [2024-10-14 00:11:14,029 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a63343fd1/f479c7e0e4694e90b991e37de7e0fb59/FLAGeb4e736bb [2024-10-14 00:11:14,045 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a63343fd1/f479c7e0e4694e90b991e37de7e0fb59 [2024-10-14 00:11:14,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 00:11:14,050 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 00:11:14,054 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 00:11:14,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 00:11:14,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 00:11:14,061 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:11:14" (1/1) ... [2024-10-14 00:11:14,062 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3e87ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:14, skipping insertion in model container [2024-10-14 00:11:14,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:11:14" (1/1) ... [2024-10-14 00:11:14,138 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 00:11:14,369 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2024-10-14 00:11:14,380 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2024-10-14 00:11:15,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 00:11:15,035 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 00:11:15,050 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2024-10-14 00:11:15,051 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2024-10-14 00:11:15,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 00:11:15,324 INFO L204 MainTranslator]: Completed translation [2024-10-14 00:11:15,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15 WrapperNode [2024-10-14 00:11:15,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 00:11:15,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 00:11:15,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 00:11:15,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 00:11:15,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:15,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:15,715 INFO L138 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 1877 [2024-10-14 00:11:15,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 00:11:15,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 00:11:15,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 00:11:15,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 00:11:15,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:15,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:15,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:15,947 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-14 00:11:15,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:15,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:16,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:16,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:16,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:16,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:16,143 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 00:11:16,144 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 00:11:16,145 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 00:11:16,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 00:11:16,146 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (1/1) ... [2024-10-14 00:11:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 00:11:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 00:11:16,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 00:11:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 00:11:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 00:11:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2024-10-14 00:11:16,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2024-10-14 00:11:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2024-10-14 00:11:16,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2024-10-14 00:11:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 00:11:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 00:11:16,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 00:11:16,460 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 00:11:16,463 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 00:11:44,397 INFO L? ?]: Removed 118 outVars from TransFormulas that were not future-live. [2024-10-14 00:11:44,397 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 00:11:44,449 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 00:11:44,453 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-14 00:11:44,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:11:44 BoogieIcfgContainer [2024-10-14 00:11:44,454 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 00:11:44,456 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 00:11:44,456 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 00:11:44,461 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 00:11:44,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:11:14" (1/3) ... [2024-10-14 00:11:44,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d7a60d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:11:44, skipping insertion in model container [2024-10-14 00:11:44,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:15" (2/3) ... [2024-10-14 00:11:44,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d7a60d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:11:44, skipping insertion in model container [2024-10-14 00:11:44,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:11:44" (3/3) ... [2024-10-14 00:11:44,466 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11.c [2024-10-14 00:11:44,483 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 00:11:44,483 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-14 00:11:44,582 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 00:11:44,591 INFO L333 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, 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;@23570f44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 00:11:44,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-14 00:11:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 508 states, 403 states have (on average 1.6352357320099256) internal successors, (659), 405 states have internal predecessors, (659), 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) [2024-10-14 00:11:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 00:11:44,615 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:11:44,616 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 00:11:44,616 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:11:44,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:11:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash -126402155, now seen corresponding path program 1 times [2024-10-14 00:11:44,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:11:44,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290756323] [2024-10-14 00:11:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:11:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:11:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:11:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:11:45,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:11:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290756323] [2024-10-14 00:11:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290756323] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:11:45,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:11:45,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 00:11:45,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980923926] [2024-10-14 00:11:45,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:11:45,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 00:11:45,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:11:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 00:11:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 00:11:45,425 INFO L87 Difference]: Start difference. First operand has 508 states, 403 states have (on average 1.6352357320099256) internal successors, (659), 405 states have internal predecessors, (659), 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 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-10-14 00:11:49,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:11:58,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:01,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:05,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:09,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:13,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:16,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:16,340 INFO L93 Difference]: Finished difference Result 1053 states and 1886 transitions. [2024-10-14 00:12:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 00:12:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2024-10-14 00:12:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:16,370 INFO L225 Difference]: With dead ends: 1053 [2024-10-14 00:12:16,370 INFO L226 Difference]: Without dead ends: 542 [2024-10-14 00:12:16,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 00:12:16,383 INFO L432 NwaCegarLoop]: 529 mSDtfsCounter, 141 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 105 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:16,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 838 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1159 Invalid, 3 Unknown, 0 Unchecked, 30.8s Time] [2024-10-14 00:12:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2024-10-14 00:12:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 537. [2024-10-14 00:12:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 435 states have (on average 1.6206896551724137) internal successors, (705), 534 states have internal predecessors, (705), 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) [2024-10-14 00:12:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 805 transitions. [2024-10-14 00:12:16,484 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 805 transitions. Word has length 15 [2024-10-14 00:12:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:16,485 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 805 transitions. [2024-10-14 00:12:16,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-10-14 00:12:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 805 transitions. [2024-10-14 00:12:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 00:12:16,486 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:16,486 INFO L215 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] [2024-10-14 00:12:16,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 00:12:16,487 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:16,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash -468910848, now seen corresponding path program 1 times [2024-10-14 00:12:16,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:16,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438646176] [2024-10-14 00:12:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:16,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:16,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438646176] [2024-10-14 00:12:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438646176] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:16,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:16,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 00:12:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728035398] [2024-10-14 00:12:16,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:16,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:16,870 INFO L87 Difference]: Start difference. First operand 537 states and 805 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) [2024-10-14 00:12:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:16,930 INFO L93 Difference]: Finished difference Result 941 states and 1459 transitions. [2024-10-14 00:12:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 00:12:16,931 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 [2024-10-14 00:12:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:16,937 INFO L225 Difference]: With dead ends: 941 [2024-10-14 00:12:16,938 INFO L226 Difference]: Without dead ends: 538 [2024-10-14 00:12:16,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:16,941 INFO L432 NwaCegarLoop]: 650 mSDtfsCounter, 0 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:16,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1295 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 00:12:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2024-10-14 00:12:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2024-10-14 00:12:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 436 states have (on average 1.6192660550458715) internal successors, (706), 535 states have internal predecessors, (706), 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) [2024-10-14 00:12:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 806 transitions. [2024-10-14 00:12:16,979 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 806 transitions. Word has length 23 [2024-10-14 00:12:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:16,979 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 806 transitions. [2024-10-14 00:12:16,980 INFO L472 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) [2024-10-14 00:12:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 806 transitions. [2024-10-14 00:12:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 00:12:16,982 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:16,982 INFO L215 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] [2024-10-14 00:12:16,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 00:12:16,983 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:16,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash 211147522, now seen corresponding path program 1 times [2024-10-14 00:12:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:16,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326227998] [2024-10-14 00:12:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:17,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326227998] [2024-10-14 00:12:17,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326227998] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:17,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:17,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 00:12:17,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86097789] [2024-10-14 00:12:17,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:17,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:17,118 INFO L87 Difference]: Start difference. First operand 538 states and 806 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) [2024-10-14 00:12:19,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:22,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:22,558 INFO L93 Difference]: Finished difference Result 1319 states and 2069 transitions. [2024-10-14 00:12:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 00:12:22,560 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 [2024-10-14 00:12:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:22,565 INFO L225 Difference]: With dead ends: 1319 [2024-10-14 00:12:22,565 INFO L226 Difference]: Without dead ends: 915 [2024-10-14 00:12:22,567 INFO L431 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 [2024-10-14 00:12:22,568 INFO L432 NwaCegarLoop]: 644 mSDtfsCounter, 579 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:22,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1248 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-10-14 00:12:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2024-10-14 00:12:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 819. [2024-10-14 00:12:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 717 states have (on average 1.693165969316597) internal successors, (1214), 816 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) [2024-10-14 00:12:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1314 transitions. [2024-10-14 00:12:22,602 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1314 transitions. Word has length 23 [2024-10-14 00:12:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:22,603 INFO L471 AbstractCegarLoop]: Abstraction has 819 states and 1314 transitions. [2024-10-14 00:12:22,603 INFO L472 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) [2024-10-14 00:12:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1314 transitions. [2024-10-14 00:12:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 00:12:22,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:22,608 INFO L215 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] [2024-10-14 00:12:22,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 00:12:22,609 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:22,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2045078207, now seen corresponding path program 1 times [2024-10-14 00:12:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525690092] [2024-10-14 00:12:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:22,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:22,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525690092] [2024-10-14 00:12:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525690092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:22,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:22,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 00:12:22,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166175954] [2024-10-14 00:12:22,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:22,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:22,711 INFO L87 Difference]: Start difference. First operand 819 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2024-10-14 00:12:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:23,450 INFO L93 Difference]: Finished difference Result 1496 states and 2459 transitions. [2024-10-14 00:12:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 00:12:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 [2024-10-14 00:12:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:23,459 INFO L225 Difference]: With dead ends: 1496 [2024-10-14 00:12:23,460 INFO L226 Difference]: Without dead ends: 1483 [2024-10-14 00:12:23,461 INFO L431 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 [2024-10-14 00:12:23,462 INFO L432 NwaCegarLoop]: 657 mSDtfsCounter, 610 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:23,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1270 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 00:12:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2024-10-14 00:12:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1390. [2024-10-14 00:12:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1288 states have (on average 1.7383540372670807) internal successors, (2239), 1387 states have internal predecessors, (2239), 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) [2024-10-14 00:12:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2339 transitions. [2024-10-14 00:12:23,502 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2339 transitions. Word has length 24 [2024-10-14 00:12:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:23,503 INFO L471 AbstractCegarLoop]: Abstraction has 1390 states and 2339 transitions. [2024-10-14 00:12:23,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2024-10-14 00:12:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2339 transitions. [2024-10-14 00:12:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 00:12:23,506 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:23,506 INFO L215 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] [2024-10-14 00:12:23,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 00:12:23,507 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:23,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1026375108, now seen corresponding path program 1 times [2024-10-14 00:12:23,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:23,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473680205] [2024-10-14 00:12:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:23,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:23,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:23,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473680205] [2024-10-14 00:12:23,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473680205] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:23,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:23,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 00:12:23,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729890161] [2024-10-14 00:12:23,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:23,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:23,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:23,603 INFO L87 Difference]: Start difference. First operand 1390 states and 2339 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) [2024-10-14 00:12:29,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:33,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:35,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 00:12:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:36,587 INFO L93 Difference]: Finished difference Result 3805 states and 6566 transitions. [2024-10-14 00:12:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 00:12:36,588 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 [2024-10-14 00:12:36,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:36,601 INFO L225 Difference]: With dead ends: 3805 [2024-10-14 00:12:36,602 INFO L226 Difference]: Without dead ends: 2549 [2024-10-14 00:12:36,606 INFO L431 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 [2024-10-14 00:12:36,607 INFO L432 NwaCegarLoop]: 681 mSDtfsCounter, 580 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:36,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1190 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 12.9s Time] [2024-10-14 00:12:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2024-10-14 00:12:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2476. [2024-10-14 00:12:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2374 states have (on average 1.7670598146588037) internal successors, (4195), 2473 states have internal predecessors, (4195), 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) [2024-10-14 00:12:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 4295 transitions. [2024-10-14 00:12:36,703 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 4295 transitions. Word has length 25 [2024-10-14 00:12:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:36,703 INFO L471 AbstractCegarLoop]: Abstraction has 2476 states and 4295 transitions. [2024-10-14 00:12:36,704 INFO L472 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) [2024-10-14 00:12:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 4295 transitions. [2024-10-14 00:12:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 00:12:36,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:36,706 INFO L215 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] [2024-10-14 00:12:36,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 00:12:36,706 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:36,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 583475968, now seen corresponding path program 1 times [2024-10-14 00:12:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:36,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874231941] [2024-10-14 00:12:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874231941] [2024-10-14 00:12:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874231941] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 00:12:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869451120] [2024-10-14 00:12:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:36,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:36,816 INFO L87 Difference]: Start difference. First operand 2476 states and 4295 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) [2024-10-14 00:12:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:36,938 INFO L93 Difference]: Finished difference Result 4802 states and 8403 transitions. [2024-10-14 00:12:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 00:12:36,940 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 [2024-10-14 00:12:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:36,961 INFO L225 Difference]: With dead ends: 4802 [2024-10-14 00:12:36,961 INFO L226 Difference]: Without dead ends: 4796 [2024-10-14 00:12:36,964 INFO L431 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 [2024-10-14 00:12:36,966 INFO L432 NwaCegarLoop]: 659 mSDtfsCounter, 637 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:36,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1291 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 00:12:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2024-10-14 00:12:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4694. [2024-10-14 00:12:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4592 states have (on average 1.783754355400697) internal successors, (8191), 4691 states have internal predecessors, (8191), 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) [2024-10-14 00:12:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 8291 transitions. [2024-10-14 00:12:37,086 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 8291 transitions. Word has length 25 [2024-10-14 00:12:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:37,087 INFO L471 AbstractCegarLoop]: Abstraction has 4694 states and 8291 transitions. [2024-10-14 00:12:37,087 INFO L472 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) [2024-10-14 00:12:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 8291 transitions. [2024-10-14 00:12:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 00:12:37,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:37,088 INFO L215 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] [2024-10-14 00:12:37,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 00:12:37,089 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:37,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1752154153, now seen corresponding path program 1 times [2024-10-14 00:12:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:37,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568618947] [2024-10-14 00:12:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568618947] [2024-10-14 00:12:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568618947] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:37,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 00:12:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239540706] [2024-10-14 00:12:37,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:37,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:37,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:37,176 INFO L87 Difference]: Start difference. First operand 4694 states and 8291 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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) [2024-10-14 00:12:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 00:12:37,823 INFO L93 Difference]: Finished difference Result 13651 states and 24276 transitions. [2024-10-14 00:12:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 00:12:37,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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 26 [2024-10-14 00:12:37,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 00:12:37,865 INFO L225 Difference]: With dead ends: 13651 [2024-10-14 00:12:37,866 INFO L226 Difference]: Without dead ends: 9091 [2024-10-14 00:12:37,877 INFO L431 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 [2024-10-14 00:12:37,878 INFO L432 NwaCegarLoop]: 681 mSDtfsCounter, 602 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 00:12:37,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1317 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 00:12:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2024-10-14 00:12:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 8990. [2024-10-14 00:12:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8888 states have (on average 1.786116111611161) internal successors, (15875), 8987 states have internal predecessors, (15875), 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) [2024-10-14 00:12:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 15975 transitions. [2024-10-14 00:12:38,129 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 15975 transitions. Word has length 26 [2024-10-14 00:12:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 00:12:38,130 INFO L471 AbstractCegarLoop]: Abstraction has 8990 states and 15975 transitions. [2024-10-14 00:12:38,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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) [2024-10-14 00:12:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 15975 transitions. [2024-10-14 00:12:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 00:12:38,131 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 00:12:38,131 INFO L215 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] [2024-10-14 00:12:38,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 00:12:38,131 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 00:12:38,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 00:12:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 170682126, now seen corresponding path program 1 times [2024-10-14 00:12:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 00:12:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915663109] [2024-10-14 00:12:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 00:12:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 00:12:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 00:12:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 00:12:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 00:12:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915663109] [2024-10-14 00:12:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915663109] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 00:12:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 00:12:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 00:12:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647193462] [2024-10-14 00:12:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 00:12:38,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 00:12:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 00:12:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 00:12:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 00:12:38,214 INFO L87 Difference]: Start difference. First operand 8990 states and 15975 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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) [2024-10-14 00:12:40,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []