./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/eca-rers2018/Problem11.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/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 0.2.3-dev-6ae2ee4-m [2023-11-22 19:06:51,695 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 19:06:51,758 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 19:06:51,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 19:06:51,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 19:06:51,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 19:06:51,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 19:06:51,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 19:06:51,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 19:06:51,795 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 19:06:51,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 19:06:51,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 19:06:51,796 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 19:06:51,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 19:06:51,797 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 19:06:51,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 19:06:51,797 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 19:06:51,798 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 19:06:51,798 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 19:06:51,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 19:06:51,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 19:06:51,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 19:06:51,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 19:06:51,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 19:06:51,799 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 19:06:51,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 19:06:51,799 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 19:06:51,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 19:06:51,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 19:06:51,800 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 19:06:51,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 19:06:51,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:06:51,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 19:06:51,801 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 19:06:51,801 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 19:06:51,801 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 19:06:51,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 19:06:51,802 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 19:06:51,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 19:06:51,802 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 19:06:51,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 19:06:51,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 19:06:51,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2023-11-22 19:06:51,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 19:06:51,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 19:06:51,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 19:06:51,972 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 19:06:51,973 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 19:06:51,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2018/Problem11.c [2023-11-22 19:06:52,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 19:06:53,381 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 19:06:53,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem11.c [2023-11-22 19:06:53,406 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520daa1e6/dcb3551390884c07b5a66fcb6ea46950/FLAG15abd7a5e [2023-11-22 19:06:53,422 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520daa1e6/dcb3551390884c07b5a66fcb6ea46950 [2023-11-22 19:06:53,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 19:06:53,425 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 19:06:53,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 19:06:53,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 19:06:53,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 19:06:53,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:06:53" (1/1) ... [2023-11-22 19:06:53,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a24731c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:53, skipping insertion in model container [2023-11-22 19:06:53,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:06:53" (1/1) ... [2023-11-22 19:06:53,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 19:06:53,631 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/Problem11.c[778,791] [2023-11-22 19:06:53,637 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/Problem11.c[817,830] [2023-11-22 19:06:54,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:06:54,199 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 19:06:54,209 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/Problem11.c[778,791] [2023-11-22 19:06:54,209 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/Problem11.c[817,830] [2023-11-22 19:06:54,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:06:54,366 INFO L206 MainTranslator]: Completed translation [2023-11-22 19:06:54,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54 WrapperNode [2023-11-22 19:06:54,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 19:06:54,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 19:06:54,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 19:06:54,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 19:06:54,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,579 INFO L138 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 1877 [2023-11-22 19:06:54,580 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 19:06:54,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 19:06:54,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 19:06:54,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 19:06:54,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,612 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,719 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-22 19:06:54,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 19:06:54,856 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 19:06:54,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 19:06:54,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 19:06:54,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (1/1) ... [2023-11-22 19:06:54,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:06:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:06:54,900 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 19:06:54,906 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 19:06:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 19:06:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2023-11-22 19:06:54,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2023-11-22 19:06:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2023-11-22 19:06:54,943 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2023-11-22 19:06:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 19:06:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 19:06:54,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 19:06:55,074 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 19:06:55,076 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 19:07:17,894 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 19:07:17,949 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 19:07:17,950 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 19:07:17,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:07:17 BoogieIcfgContainer [2023-11-22 19:07:17,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 19:07:17,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 19:07:17,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 19:07:17,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 19:07:17,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:06:53" (1/3) ... [2023-11-22 19:07:17,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44323ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:07:17, skipping insertion in model container [2023-11-22 19:07:17,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:06:54" (2/3) ... [2023-11-22 19:07:17,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44323ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:07:17, skipping insertion in model container [2023-11-22 19:07:17,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:07:17" (3/3) ... [2023-11-22 19:07:17,959 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11.c [2023-11-22 19:07:17,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 19:07:17,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-22 19:07:18,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 19:07:18,037 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;@6f0ba605, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 19:07:18,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-22 19:07:18,044 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) [2023-11-22 19:07:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-22 19:07:18,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:18,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:18,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:18,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -126402155, now seen corresponding path program 1 times [2023-11-22 19:07:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:18,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395395897] [2023-11-22 19:07:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:18,500 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 19:07:18,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395395897] [2023-11-22 19:07:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395395897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:18,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:18,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:18,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923361739] [2023-11-22 19:07:18,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:07:18,529 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) [2023-11-22 19:07:20,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:23,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:26,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:29,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:32,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:40,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:43,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:45,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:47,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:49,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:51,556 INFO L93 Difference]: Finished difference Result 1222 states and 2206 transitions. [2023-11-22 19:07:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:07:51,560 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 [2023-11-22 19:07:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:51,581 INFO L225 Difference]: With dead ends: 1222 [2023-11-22 19:07:51,581 INFO L226 Difference]: Without dead ends: 709 [2023-11-22 19:07:51,589 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 19:07:51,595 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 485 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 213 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:51,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 711 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 888 Invalid, 8 Unknown, 0 Unchecked, 32.9s Time] [2023-11-22 19:07:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-11-22 19:07:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 598. [2023-11-22 19:07:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 496 states have (on average 1.6330645161290323) internal successors, (810), 595 states have internal predecessors, (810), 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 19:07:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 910 transitions. [2023-11-22 19:07:51,703 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 910 transitions. Word has length 15 [2023-11-22 19:07:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:51,704 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 910 transitions. [2023-11-22 19:07:51,704 INFO L496 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) [2023-11-22 19:07:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 910 transitions. [2023-11-22 19:07:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 19:07:51,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:51,706 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 19:07:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 19:07:51,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:51,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash -468910848, now seen corresponding path program 1 times [2023-11-22 19:07:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:51,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824271948] [2023-11-22 19:07:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:51,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:07:51,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171268928] [2023-11-22 19:07:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:51,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:51,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:51,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:07:51,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 19:07:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:51,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:07:51,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:51,920 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 19:07:51,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824271948] [2023-11-22 19:07:51,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:07:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171268928] [2023-11-22 19:07:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171268928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:51,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:51,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:07:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73442251] [2023-11-22 19:07:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:51,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:51,924 INFO L87 Difference]: Start difference. First operand 598 states and 910 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 19:07:54,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:56,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:07:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:57,186 INFO L93 Difference]: Finished difference Result 1765 states and 2685 transitions. [2023-11-22 19:07:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:57,187 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 19:07:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:57,191 INFO L225 Difference]: With dead ends: 1765 [2023-11-22 19:07:57,191 INFO L226 Difference]: Without dead ends: 1168 [2023-11-22 19:07:57,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 19:07:57,193 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 579 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:57,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1248 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-11-22 19:07:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2023-11-22 19:07:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1072. [2023-11-22 19:07:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 970 states have (on average 1.622680412371134) internal successors, (1574), 1069 states have internal predecessors, (1574), 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 19:07:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1674 transitions. [2023-11-22 19:07:57,224 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1674 transitions. Word has length 23 [2023-11-22 19:07:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:57,225 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1674 transitions. [2023-11-22 19:07:57,225 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 19:07:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1674 transitions. [2023-11-22 19:07:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 19:07:57,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:57,231 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 19:07:57,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:57,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:57,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:57,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1652051197, now seen corresponding path program 1 times [2023-11-22 19:07:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:57,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411601960] [2023-11-22 19:07:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:57,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:07:57,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883608593] [2023-11-22 19:07:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:57,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:57,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:07:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 19:07:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:57,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:07:57,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:57,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411601960] [2023-11-22 19:07:57,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:07:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883608593] [2023-11-22 19:07:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883608593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:57,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:57,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:07:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380811663] [2023-11-22 19:07:57,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:57,636 INFO L87 Difference]: Start difference. First operand 1072 states and 1674 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) [2023-11-22 19:07:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:58,529 INFO L93 Difference]: Finished difference Result 2135 states and 3331 transitions. [2023-11-22 19:07:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:58,531 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 [2023-11-22 19:07:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:58,537 INFO L225 Difference]: With dead ends: 2135 [2023-11-22 19:07:58,537 INFO L226 Difference]: Without dead ends: 2122 [2023-11-22 19:07:58,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 19:07:58,538 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 610 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:58,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1270 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 19:07:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2023-11-22 19:07:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2029. [2023-11-22 19:07:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 1927 states have (on average 1.6144265697976128) internal successors, (3111), 2026 states have internal predecessors, (3111), 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 19:07:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 3211 transitions. [2023-11-22 19:07:58,590 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 3211 transitions. Word has length 24 [2023-11-22 19:07:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:58,591 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 3211 transitions. [2023-11-22 19:07:58,591 INFO L496 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) [2023-11-22 19:07:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 3211 transitions. [2023-11-22 19:07:58,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 19:07:58,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:58,592 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 19:07:58,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-22 19:07:58,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 19:07:58,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:58,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:58,820 INFO L85 PathProgramCache]: Analyzing trace with hash 325310530, now seen corresponding path program 1 times [2023-11-22 19:07:58,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:58,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025682602] [2023-11-22 19:07:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:58,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:58,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:07:58,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072142345] [2023-11-22 19:07:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:58,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:58,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:07:58,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 19:07:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:58,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:07:58,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:58,970 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 19:07:58,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:58,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:58,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025682602] [2023-11-22 19:07:58,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:07:58,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072142345] [2023-11-22 19:07:58,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072142345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:58,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:58,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430118801] [2023-11-22 19:07:58,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:58,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:58,973 INFO L87 Difference]: Start difference. First operand 2029 states and 3211 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 19:08:01,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:05,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:07,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:09,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:12,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:12,113 INFO L93 Difference]: Finished difference Result 5597 states and 8733 transitions. [2023-11-22 19:08:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:12,113 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 19:08:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:12,124 INFO L225 Difference]: With dead ends: 5597 [2023-11-22 19:08:12,124 INFO L226 Difference]: Without dead ends: 3429 [2023-11-22 19:08:12,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 19:08:12,128 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 523 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:12,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1303 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 131 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2023-11-22 19:08:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2023-11-22 19:08:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 3034. [2023-11-22 19:08:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 2932 states have (on average 1.616643929058663) internal successors, (4740), 3031 states have internal predecessors, (4740), 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 19:08:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4840 transitions. [2023-11-22 19:08:12,195 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4840 transitions. Word has length 25 [2023-11-22 19:08:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:12,196 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4840 transitions. [2023-11-22 19:08:12,196 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 19:08:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4840 transitions. [2023-11-22 19:08:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 19:08:12,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:12,197 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 19:08:12,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-22 19:08:12,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:12,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:12,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1026375108, now seen corresponding path program 1 times [2023-11-22 19:08:12,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:12,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680397988] [2023-11-22 19:08:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:12,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:12,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552421634] [2023-11-22 19:08:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:12,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:12,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:12,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 19:08:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:12,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:12,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:12,611 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 19:08:12,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680397988] [2023-11-22 19:08:12,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552421634] [2023-11-22 19:08:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552421634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:12,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:12,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:12,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432847768] [2023-11-22 19:08:12,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:12,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:12,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:12,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:12,618 INFO L87 Difference]: Start difference. First operand 3034 states and 4840 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 19:08:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:12,670 INFO L93 Difference]: Finished difference Result 6031 states and 9617 transitions. [2023-11-22 19:08:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:12,670 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 19:08:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:12,685 INFO L225 Difference]: With dead ends: 6031 [2023-11-22 19:08:12,685 INFO L226 Difference]: Without dead ends: 6025 [2023-11-22 19:08:12,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 19:08:12,687 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 623 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:12,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1291 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:08:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6025 states. [2023-11-22 19:08:12,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6025 to 5826. [2023-11-22 19:08:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5826 states, 5724 states have (on average 1.6243885394828792) internal successors, (9298), 5823 states have internal predecessors, (9298), 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 19:08:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5826 states to 5826 states and 9398 transitions. [2023-11-22 19:08:12,763 INFO L78 Accepts]: Start accepts. Automaton has 5826 states and 9398 transitions. Word has length 25 [2023-11-22 19:08:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:12,763 INFO L495 AbstractCegarLoop]: Abstraction has 5826 states and 9398 transitions. [2023-11-22 19:08:12,764 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 19:08:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 5826 states and 9398 transitions. [2023-11-22 19:08:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 19:08:12,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:12,764 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] [2023-11-22 19:08:12,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:12,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:12,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1752154153, now seen corresponding path program 1 times [2023-11-22 19:08:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:12,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906766510] [2023-11-22 19:08:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:13,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554864725] [2023-11-22 19:08:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:13,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:13,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:13,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:13,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 19:08:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:13,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:13,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:13,179 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 19:08:13,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:13,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906766510] [2023-11-22 19:08:13,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:13,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554864725] [2023-11-22 19:08:13,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554864725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:13,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:13,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:13,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566518032] [2023-11-22 19:08:13,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:13,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:13,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:13,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:13,181 INFO L87 Difference]: Start difference. First operand 5826 states and 9398 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) [2023-11-22 19:08:15,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:15,813 INFO L93 Difference]: Finished difference Result 17349 states and 27981 transitions. [2023-11-22 19:08:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:15,815 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 [2023-11-22 19:08:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:15,851 INFO L225 Difference]: With dead ends: 17349 [2023-11-22 19:08:15,852 INFO L226 Difference]: Without dead ends: 11524 [2023-11-22 19:08:15,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 19:08:15,863 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 602 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:15,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1317 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-22 19:08:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11524 states. [2023-11-22 19:08:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11524 to 11326. [2023-11-22 19:08:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11326 states, 11224 states have (on average 1.6241981468282252) internal successors, (18230), 11323 states have internal predecessors, (18230), 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 19:08:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11326 states to 11326 states and 18330 transitions. [2023-11-22 19:08:16,040 INFO L78 Accepts]: Start accepts. Automaton has 11326 states and 18330 transitions. Word has length 26 [2023-11-22 19:08:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:16,040 INFO L495 AbstractCegarLoop]: Abstraction has 11326 states and 18330 transitions. [2023-11-22 19:08:16,040 INFO L496 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) [2023-11-22 19:08:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11326 states and 18330 transitions. [2023-11-22 19:08:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 19:08:16,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:16,042 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] [2023-11-22 19:08:16,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:16,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:16,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:16,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash 170682126, now seen corresponding path program 1 times [2023-11-22 19:08:16,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:16,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081398552] [2023-11-22 19:08:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:16,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:16,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:16,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264226969] [2023-11-22 19:08:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:16,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:16,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:16,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:16,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 19:08:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:16,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:16,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:16,438 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 19:08:16,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081398552] [2023-11-22 19:08:16,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264226969] [2023-11-22 19:08:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264226969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:16,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977100622] [2023-11-22 19:08:16,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:16,441 INFO L87 Difference]: Start difference. First operand 11326 states and 18330 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) [2023-11-22 19:08:18,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:19,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:22,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:24,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:25,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:25,645 INFO L93 Difference]: Finished difference Result 33654 states and 54490 transitions. [2023-11-22 19:08:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:25,648 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 28 [2023-11-22 19:08:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:25,759 INFO L225 Difference]: With dead ends: 33654 [2023-11-22 19:08:25,760 INFO L226 Difference]: Without dead ends: 22329 [2023-11-22 19:08:25,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 19:08:25,768 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 593 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:25,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1345 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2023-11-22 19:08:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22329 states. [2023-11-22 19:08:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22329 to 22130. [2023-11-22 19:08:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22130 states, 22028 states have (on average 1.62329762120937) internal successors, (35758), 22127 states have internal predecessors, (35758), 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 19:08:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22130 states to 22130 states and 35858 transitions. [2023-11-22 19:08:26,296 INFO L78 Accepts]: Start accepts. Automaton has 22130 states and 35858 transitions. Word has length 28 [2023-11-22 19:08:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:26,297 INFO L495 AbstractCegarLoop]: Abstraction has 22130 states and 35858 transitions. [2023-11-22 19:08:26,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-22 19:08:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 22130 states and 35858 transitions. [2023-11-22 19:08:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-22 19:08:26,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:26,299 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] [2023-11-22 19:08:26,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:26,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:26,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:26,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash 995495761, now seen corresponding path program 1 times [2023-11-22 19:08:26,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:26,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168226679] [2023-11-22 19:08:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:26,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272667519] [2023-11-22 19:08:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:26,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:26,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:26,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 19:08:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:26,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:26,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:26,767 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 19:08:26,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:26,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168226679] [2023-11-22 19:08:26,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272667519] [2023-11-22 19:08:26,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272667519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:26,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:26,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896406616] [2023-11-22 19:08:26,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:26,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:26,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:26,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:26,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:26,769 INFO L87 Difference]: Start difference. First operand 22130 states and 35858 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 19:08:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:27,966 INFO L93 Difference]: Finished difference Result 44259 states and 71714 transitions. [2023-11-22 19:08:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:27,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 29 [2023-11-22 19:08:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:28,138 INFO L225 Difference]: With dead ends: 44259 [2023-11-22 19:08:28,138 INFO L226 Difference]: Without dead ends: 44256 [2023-11-22 19:08:28,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 19:08:28,148 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 622 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:28,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1438 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 19:08:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44256 states. [2023-11-22 19:08:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44256 to 44058. [2023-11-22 19:08:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44058 states, 43956 states have (on average 1.6232141232141233) internal successors, (71350), 44055 states have internal predecessors, (71350), 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 19:08:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44058 states to 44058 states and 71450 transitions. [2023-11-22 19:08:29,053 INFO L78 Accepts]: Start accepts. Automaton has 44058 states and 71450 transitions. Word has length 29 [2023-11-22 19:08:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:29,054 INFO L495 AbstractCegarLoop]: Abstraction has 44058 states and 71450 transitions. [2023-11-22 19:08:29,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 19:08:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 44058 states and 71450 transitions. [2023-11-22 19:08:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 19:08:29,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:29,055 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] [2023-11-22 19:08:29,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-22 19:08:29,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:29,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:29,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:29,267 INFO L85 PathProgramCache]: Analyzing trace with hash 996467138, now seen corresponding path program 1 times [2023-11-22 19:08:29,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:29,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948938560] [2023-11-22 19:08:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:29,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:29,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:29,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324820089] [2023-11-22 19:08:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:29,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:29,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:29,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:29,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 19:08:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:29,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:29,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:29,498 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 19:08:29,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:29,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948938560] [2023-11-22 19:08:29,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:29,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324820089] [2023-11-22 19:08:29,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324820089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:29,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944878109] [2023-11-22 19:08:29,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:29,500 INFO L87 Difference]: Start difference. First operand 44058 states and 71450 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 19:08:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:30,098 INFO L93 Difference]: Finished difference Result 128670 states and 208766 transitions. [2023-11-22 19:08:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 30 [2023-11-22 19:08:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:30,287 INFO L225 Difference]: With dead ends: 128670 [2023-11-22 19:08:30,287 INFO L226 Difference]: Without dead ends: 84613 [2023-11-22 19:08:30,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 19:08:30,414 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 616 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:30,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1206 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:08:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84613 states. [2023-11-22 19:08:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84613 to 84426. [2023-11-22 19:08:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84426 states, 84324 states have (on average 1.6159337792324842) internal successors, (136262), 84423 states have internal predecessors, (136262), 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 19:08:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84426 states to 84426 states and 136362 transitions. [2023-11-22 19:08:31,688 INFO L78 Accepts]: Start accepts. Automaton has 84426 states and 136362 transitions. Word has length 30 [2023-11-22 19:08:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:31,688 INFO L495 AbstractCegarLoop]: Abstraction has 84426 states and 136362 transitions. [2023-11-22 19:08:31,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 19:08:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 84426 states and 136362 transitions. [2023-11-22 19:08:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 19:08:31,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:31,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:08:31,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-22 19:08:31,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1941725460, now seen corresponding path program 1 times [2023-11-22 19:08:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96556018] [2023-11-22 19:08:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:31,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073941191] [2023-11-22 19:08:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:31,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:31,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:31,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:31,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 19:08:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:32,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:32,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:32,252 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 19:08:32,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:32,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:32,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96556018] [2023-11-22 19:08:32,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:32,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073941191] [2023-11-22 19:08:32,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073941191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:32,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:32,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:32,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427936548] [2023-11-22 19:08:32,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:32,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:32,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:32,255 INFO L87 Difference]: Start difference. First operand 84426 states and 136362 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:34,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:35,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:36,949 INFO L93 Difference]: Finished difference Result 253276 states and 409084 transitions. [2023-11-22 19:08:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-22 19:08:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:37,216 INFO L225 Difference]: With dead ends: 253276 [2023-11-22 19:08:37,216 INFO L226 Difference]: Without dead ends: 168851 [2023-11-22 19:08:37,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 19:08:37,281 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 631 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:37,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1315 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-22 19:08:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168851 states. [2023-11-22 19:08:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168851 to 168650. [2023-11-22 19:08:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168650 states, 168548 states have (on average 1.6147684932482143) internal successors, (272166), 168647 states have internal predecessors, (272166), 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 19:08:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168650 states to 168650 states and 272266 transitions. [2023-11-22 19:08:39,813 INFO L78 Accepts]: Start accepts. Automaton has 168650 states and 272266 transitions. Word has length 31 [2023-11-22 19:08:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:39,813 INFO L495 AbstractCegarLoop]: Abstraction has 168650 states and 272266 transitions. [2023-11-22 19:08:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 168650 states and 272266 transitions. [2023-11-22 19:08:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 19:08:39,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:39,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:08:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:40,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 19:08:40,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:40,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 920657106, now seen corresponding path program 1 times [2023-11-22 19:08:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:40,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538425980] [2023-11-22 19:08:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:40,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:40,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:40,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897068698] [2023-11-22 19:08:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:40,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:40,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:40,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:40,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 19:08:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:40,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:40,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:40,189 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 19:08:40,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:40,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538425980] [2023-11-22 19:08:40,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897068698] [2023-11-22 19:08:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897068698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104281639] [2023-11-22 19:08:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:40,192 INFO L87 Difference]: Start difference. First operand 168650 states and 272266 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:43,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:45,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:46,554 INFO L93 Difference]: Finished difference Result 417564 states and 673980 transitions. [2023-11-22 19:08:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:46,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-22 19:08:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:47,344 INFO L225 Difference]: With dead ends: 417564 [2023-11-22 19:08:47,345 INFO L226 Difference]: Without dead ends: 248915 [2023-11-22 19:08:47,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 19:08:47,395 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 629 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:47,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 1311 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2023-11-22 19:08:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248915 states. [2023-11-22 19:08:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248915 to 166570. [2023-11-22 19:08:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166570 states, 166468 states have (on average 1.6130307326332989) internal successors, (268518), 166567 states have internal predecessors, (268518), 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 19:08:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166570 states to 166570 states and 268618 transitions. [2023-11-22 19:08:50,284 INFO L78 Accepts]: Start accepts. Automaton has 166570 states and 268618 transitions. Word has length 31 [2023-11-22 19:08:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:50,284 INFO L495 AbstractCegarLoop]: Abstraction has 166570 states and 268618 transitions. [2023-11-22 19:08:50,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 166570 states and 268618 transitions. [2023-11-22 19:08:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 19:08:50,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:50,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:08:50,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 19:08:50,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:50,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1127907818, now seen corresponding path program 1 times [2023-11-22 19:08:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292372043] [2023-11-22 19:08:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:50,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:08:50,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143838982] [2023-11-22 19:08:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:50,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:08:50,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 19:08:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:50,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:08:50,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:50,656 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 19:08:50,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:08:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292372043] [2023-11-22 19:08:50,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:08:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143838982] [2023-11-22 19:08:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143838982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:08:50,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:08:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:08:50,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240613980] [2023-11-22 19:08:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:08:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:08:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:08:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:08:50,659 INFO L87 Difference]: Start difference. First operand 166570 states and 268618 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:52,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:55,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:08:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:56,805 INFO L93 Difference]: Finished difference Result 497072 states and 801808 transitions. [2023-11-22 19:08:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:08:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-22 19:08:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:57,579 INFO L225 Difference]: With dead ends: 497072 [2023-11-22 19:08:57,579 INFO L226 Difference]: Without dead ends: 330503 [2023-11-22 19:08:57,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 19:08:57,648 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 580 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:57,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1339 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-22 19:08:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330503 states. [2023-11-22 19:09:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330503 to 330314. [2023-11-22 19:09:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330314 states, 330212 states have (on average 1.595986820587986) internal successors, (527014), 330311 states have internal predecessors, (527014), 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 19:09:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330314 states to 330314 states and 527114 transitions. [2023-11-22 19:09:02,431 INFO L78 Accepts]: Start accepts. Automaton has 330314 states and 527114 transitions. Word has length 31 [2023-11-22 19:09:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:09:02,432 INFO L495 AbstractCegarLoop]: Abstraction has 330314 states and 527114 transitions. [2023-11-22 19:09:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:09:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 330314 states and 527114 transitions. [2023-11-22 19:09:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-22 19:09:02,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:09:02,433 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 19:09:02,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-22 19:09:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 19:09:02,648 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:09:02,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:09:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1608847141, now seen corresponding path program 1 times [2023-11-22 19:09:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:09:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290245082] [2023-11-22 19:09:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:09:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:09:02,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:09:02,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423863160] [2023-11-22 19:09:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:09:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:09:02,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:09:02,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:09:02,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 19:09:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:09:02,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:09:02,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:09:02,823 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 19:09:02,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:09:02,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:09:02,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290245082] [2023-11-22 19:09:02,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:09:02,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423863160] [2023-11-22 19:09:02,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423863160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:09:02,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:09:02,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:09:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587881838] [2023-11-22 19:09:02,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:09:02,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:09:02,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:09:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:09:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:09:02,825 INFO L87 Difference]: Start difference. First operand 330314 states and 527114 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 19:09:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:09:05,124 INFO L93 Difference]: Finished difference Result 413926 states and 660932 transitions. [2023-11-22 19:09:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:09:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 19:09:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:09:05,745 INFO L225 Difference]: With dead ends: 413926 [2023-11-22 19:09:05,745 INFO L226 Difference]: Without dead ends: 413920 [2023-11-22 19:09:05,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 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 19:09:05,808 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 615 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:09:05,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1321 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:09:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413920 states. [2023-11-22 19:09:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413920 to 413722. [2023-11-22 19:09:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413722 states, 413620 states have (on average 1.593477104588753) internal successors, (659094), 413719 states have internal predecessors, (659094), 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 19:09:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413722 states to 413722 states and 659194 transitions. [2023-11-22 19:09:12,264 INFO L78 Accepts]: Start accepts. Automaton has 413722 states and 659194 transitions. Word has length 33 [2023-11-22 19:09:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:09:12,265 INFO L495 AbstractCegarLoop]: Abstraction has 413722 states and 659194 transitions. [2023-11-22 19:09:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 19:09:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 413722 states and 659194 transitions. [2023-11-22 19:09:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 19:09:12,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:09:12,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:09:12,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 19:09:12,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 19:09:12,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:09:12,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:09:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1664697277, now seen corresponding path program 1 times [2023-11-22 19:09:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:09:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223071005] [2023-11-22 19:09:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:09:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:09:12,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 19:09:12,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73799675] [2023-11-22 19:09:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:09:12,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:09:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:09:12,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 19:09:12,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 19:09:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:09:12,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 19:09:12,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:09:12,631 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 19:09:12,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:09:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:09:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223071005] [2023-11-22 19:09:12,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 19:09:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73799675] [2023-11-22 19:09:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73799675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:09:12,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:09:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:09:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009909658] [2023-11-22 19:09:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:09:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:09:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:09:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:09:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:09:12,634 INFO L87 Difference]: Start difference. First operand 413722 states and 659194 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:09:14,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:17,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:19,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:21,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:23,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:24,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:26,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-22 19:09:28,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []