./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:09:15,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:09:15,777 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:09:15,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:09:15,785 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:09:15,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:09:15,807 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:09:15,807 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:09:15,808 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:09:15,809 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:09:15,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:09:15,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:09:15,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:09:15,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:09:15,815 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:09:15,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:09:15,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:09:15,815 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:09:15,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:09:15,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:09:15,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:09:15,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:09:15,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:09:15,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:09:15,818 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:09:15,818 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:09:15,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:09:15,819 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:09:15,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:09:15,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:09:15,820 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:09:15,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:09:15,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:09:15,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:09:15,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:09:15,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:09:15,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:09:15,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:09:15,823 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:09:15,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:09:15,823 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:09:15,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:09:15,824 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2024-10-11 02:09:16,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:09:16,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:09:16,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:09:16,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:09:16,083 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:09:16,084 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-10-11 02:09:17,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:09:17,651 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:09:17,652 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-10-11 02:09:17,659 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/129f06597/9a62bfd5c54846a8b2ec85b43795e8d3/FLAGc49bb4887 [2024-10-11 02:09:17,671 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/129f06597/9a62bfd5c54846a8b2ec85b43795e8d3 [2024-10-11 02:09:17,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:09:17,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:09:17,677 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:09:17,677 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:09:17,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:09:17,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:17,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c78f77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17, skipping insertion in model container [2024-10-11 02:09:17,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:17,708 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:09:17,872 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-10-11 02:09:17,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:09:17,908 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:09:17,918 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-10-11 02:09:17,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:09:17,949 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:09:17,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17 WrapperNode [2024-10-11 02:09:17,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:09:17,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:09:17,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:09:17,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:09:17,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:17,976 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:17,991 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-10-11 02:09:17,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:09:17,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:09:17,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:09:17,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:09:18,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,002 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,015 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 02:09:18,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,018 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,023 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,025 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:09:18,026 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:09:18,026 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:09:18,026 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:09:18,027 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (1/1) ... [2024-10-11 02:09:18,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:09:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:18,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:09:18,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:09:18,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:09:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 02:09:18,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 02:09:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:09:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:09:18,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:09:18,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:09:18,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:09:18,173 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:09:18,175 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:09:18,377 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-11 02:09:18,377 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:09:18,410 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:09:18,411 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 02:09:18,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:18 BoogieIcfgContainer [2024-10-11 02:09:18,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:09:18,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:09:18,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:09:18,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:09:18,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:09:17" (1/3) ... [2024-10-11 02:09:18,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31086354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:09:18, skipping insertion in model container [2024-10-11 02:09:18,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:09:17" (2/3) ... [2024-10-11 02:09:18,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31086354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:09:18, skipping insertion in model container [2024-10-11 02:09:18,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:09:18" (3/3) ... [2024-10-11 02:09:18,422 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2024-10-11 02:09:18,439 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:09:18,439 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:09:18,507 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:09:18,513 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@624783ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:09:18,514 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:09:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 02:09:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 02:09:18,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:18,526 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:18,526 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:18,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2024-10-11 02:09:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:18,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482982941] [2024-10-11 02:09:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:09:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:09:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:09:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 02:09:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-11 02:09:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:09:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482982941] [2024-10-11 02:09:18,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482982941] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:18,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:18,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:09:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075308456] [2024-10-11 02:09:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:18,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:09:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:09:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:09:18,778 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 02:09:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:18,809 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-10-11 02:09:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:09:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-10-11 02:09:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:18,816 INFO L225 Difference]: With dead ends: 62 [2024-10-11 02:09:18,817 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 02:09:18,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:09:18,822 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:18,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 02:09:18,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-11 02:09:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 02:09:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-10-11 02:09:18,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2024-10-11 02:09:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:18,858 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-10-11 02:09:18,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 02:09:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-10-11 02:09:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 02:09:18,860 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:18,860 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:18,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:09:18,860 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:18,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2024-10-11 02:09:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656190133] [2024-10-11 02:09:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:09:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:09:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:09:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 02:09:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-11 02:09:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 02:09:19,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656190133] [2024-10-11 02:09:19,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656190133] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642698771] [2024-10-11 02:09:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:19,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:19,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:19,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:09:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:19,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 02:09:19,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 02:09:19,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:19,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642698771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:19,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:19,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-10-11 02:09:19,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916384315] [2024-10-11 02:09:19,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:19,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 02:09:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 02:09:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:09:19,762 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-11 02:09:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:20,036 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-10-11 02:09:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 02:09:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-10-11 02:09:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:20,039 INFO L225 Difference]: With dead ends: 51 [2024-10-11 02:09:20,039 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 02:09:20,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-11 02:09:20,041 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:20,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 207 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:09:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 02:09:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-11 02:09:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:09:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2024-10-11 02:09:20,066 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 39 [2024-10-11 02:09:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:20,067 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2024-10-11 02:09:20,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-11 02:09:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2024-10-11 02:09:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 02:09:20,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:20,068 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:20,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:20,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:20,275 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:20,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2024-10-11 02:09:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:20,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889349196] [2024-10-11 02:09:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:20,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:20,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968235699] [2024-10-11 02:09:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:20,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:20,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:20,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:09:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:20,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:09:20,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:09:20,404 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889349196] [2024-10-11 02:09:20,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968235699] [2024-10-11 02:09:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968235699] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:20,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273871908] [2024-10-11 02:09:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:20,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:20,408 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:09:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:20,454 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2024-10-11 02:09:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-10-11 02:09:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:20,457 INFO L225 Difference]: With dead ends: 61 [2024-10-11 02:09:20,457 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 02:09:20,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:20,459 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:20,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 02:09:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-10-11 02:09:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-11 02:09:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2024-10-11 02:09:20,483 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2024-10-11 02:09:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:20,484 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2024-10-11 02:09:20,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:09:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2024-10-11 02:09:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 02:09:20,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:20,485 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:20,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:20,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:20,686 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:20,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:20,687 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2024-10-11 02:09:20,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:20,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609415457] [2024-10-11 02:09:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:20,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:20,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483246859] [2024-10-11 02:09:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:20,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:20,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:20,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:09:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:20,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:20,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:09:20,855 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:09:20,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:20,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609415457] [2024-10-11 02:09:20,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:20,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483246859] [2024-10-11 02:09:20,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483246859] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:20,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115036471] [2024-10-11 02:09:20,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:20,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:20,859 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-11 02:09:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:20,919 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-10-11 02:09:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:09:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2024-10-11 02:09:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:20,922 INFO L225 Difference]: With dead ends: 57 [2024-10-11 02:09:20,922 INFO L226 Difference]: Without dead ends: 55 [2024-10-11 02:09:20,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:09:20,925 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:20,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-11 02:09:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-10-11 02:09:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-11 02:09:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-10-11 02:09:20,945 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 45 [2024-10-11 02:09:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:20,947 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-10-11 02:09:20,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-11 02:09:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-10-11 02:09:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 02:09:20,948 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:20,948 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:20,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 02:09:21,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:21,150 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:21,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2024-10-11 02:09:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:21,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942472189] [2024-10-11 02:09:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:21,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:21,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442576496] [2024-10-11 02:09:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:21,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:21,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:21,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:09:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:21,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 02:09:21,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-11 02:09:21,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:21,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942472189] [2024-10-11 02:09:21,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:21,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442576496] [2024-10-11 02:09:21,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442576496] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:21,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:21,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-11 02:09:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968479441] [2024-10-11 02:09:21,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:21,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 02:09:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 02:09:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:09:21,576 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-11 02:09:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:21,720 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-10-11 02:09:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:09:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2024-10-11 02:09:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:21,723 INFO L225 Difference]: With dead ends: 61 [2024-10-11 02:09:21,724 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 02:09:21,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:09:21,726 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:21,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 02:09:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-11 02:09:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-11 02:09:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-10-11 02:09:21,745 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 55 [2024-10-11 02:09:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:21,747 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-10-11 02:09:21,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-11 02:09:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-10-11 02:09:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-11 02:09:21,749 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:21,749 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:21,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:21,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:21,954 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:21,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1705825109, now seen corresponding path program 1 times [2024-10-11 02:09:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:21,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656507019] [2024-10-11 02:09:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:21,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977557735] [2024-10-11 02:09:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:21,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:21,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:21,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:21,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:09:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:09:22,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-11 02:09:22,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-11 02:09:22,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656507019] [2024-10-11 02:09:22,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977557735] [2024-10-11 02:09:22,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977557735] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:22,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-10-11 02:09:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969587711] [2024-10-11 02:09:22,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:22,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:09:22,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:09:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:22,216 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-11 02:09:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:22,329 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2024-10-11 02:09:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:09:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2024-10-11 02:09:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:22,331 INFO L225 Difference]: With dead ends: 86 [2024-10-11 02:09:22,332 INFO L226 Difference]: Without dead ends: 84 [2024-10-11 02:09:22,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:09:22,333 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:22,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 212 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-11 02:09:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2024-10-11 02:09:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:09:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-11 02:09:22,348 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 62 [2024-10-11 02:09:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:22,348 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-11 02:09:22,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-11 02:09:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-11 02:09:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-11 02:09:22,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:22,350 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:22,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:09:22,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:22,555 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:22,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2024-10-11 02:09:22,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151279022] [2024-10-11 02:09:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:09:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:09:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:09:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 02:09:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-11 02:09:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-11 02:09:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-11 02:09:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-11 02:09:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-11 02:09:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-11 02:09:22,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:22,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151279022] [2024-10-11 02:09:22,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151279022] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:22,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080526845] [2024-10-11 02:09:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:22,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:22,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:22,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:09:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:22,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:09:22,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-11 02:09:22,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-11 02:09:23,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080526845] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:23,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:09:23,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-11 02:09:23,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880580432] [2024-10-11 02:09:23,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:23,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:09:23,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:23,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:09:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:09:23,016 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-11 02:09:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:23,222 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2024-10-11 02:09:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 02:09:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-10-11 02:09:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:23,224 INFO L225 Difference]: With dead ends: 101 [2024-10-11 02:09:23,225 INFO L226 Difference]: Without dead ends: 93 [2024-10-11 02:09:23,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:09:23,226 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:23,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-11 02:09:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-10-11 02:09:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-11 02:09:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2024-10-11 02:09:23,255 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2024-10-11 02:09:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:23,256 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2024-10-11 02:09:23,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-11 02:09:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2024-10-11 02:09:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-11 02:09:23,258 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:23,259 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:23,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:09:23,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 02:09:23,460 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:23,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2024-10-11 02:09:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:23,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698773923] [2024-10-11 02:09:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:23,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:23,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45728010] [2024-10-11 02:09:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:23,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:23,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:23,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:23,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:09:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:23,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 02:09:23,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-11 02:09:23,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:23,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698773923] [2024-10-11 02:09:23,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45728010] [2024-10-11 02:09:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45728010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:23,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:23,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-10-11 02:09:23,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738505241] [2024-10-11 02:09:23,710 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:23,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:09:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:09:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:23,712 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:09:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:23,832 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-10-11 02:09:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-10-11 02:09:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:23,835 INFO L225 Difference]: With dead ends: 119 [2024-10-11 02:09:23,835 INFO L226 Difference]: Without dead ends: 116 [2024-10-11 02:09:23,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:09:23,837 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:23,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-11 02:09:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-10-11 02:09:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 62 states have internal predecessors, (73), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-11 02:09:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2024-10-11 02:09:23,876 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 70 [2024-10-11 02:09:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:23,876 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2024-10-11 02:09:23,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:09:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2024-10-11 02:09:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-11 02:09:23,879 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:23,879 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:23,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:24,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:24,085 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:24,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2024-10-11 02:09:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:24,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396048474] [2024-10-11 02:09:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499510986] [2024-10-11 02:09:24,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:09:24,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:24,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:24,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:24,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:09:24,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:09:24,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:09:24,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 02:09:24,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-11 02:09:24,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396048474] [2024-10-11 02:09:24,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499510986] [2024-10-11 02:09:24,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499510986] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:24,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:24,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-11 02:09:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841872025] [2024-10-11 02:09:24,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:24,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:09:24,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:09:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:09:24,452 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-11 02:09:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:24,597 INFO L93 Difference]: Finished difference Result 125 states and 171 transitions. [2024-10-11 02:09:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:09:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-10-11 02:09:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:24,599 INFO L225 Difference]: With dead ends: 125 [2024-10-11 02:09:24,599 INFO L226 Difference]: Without dead ends: 123 [2024-10-11 02:09:24,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:09:24,600 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:24,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:09:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-11 02:09:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-10-11 02:09:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-11 02:09:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2024-10-11 02:09:24,625 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 75 [2024-10-11 02:09:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:24,626 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2024-10-11 02:09:24,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-11 02:09:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2024-10-11 02:09:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-11 02:09:24,627 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:24,627 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:24,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:24,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:24,830 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:24,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2024-10-11 02:09:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065780124] [2024-10-11 02:09:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:24,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74260766] [2024-10-11 02:09:24,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:09:24,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:24,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:24,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:24,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:09:24,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 02:09:24,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:09:24,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-11 02:09:24,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-11 02:09:25,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:37,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065780124] [2024-10-11 02:09:37,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74260766] [2024-10-11 02:09:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74260766] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:09:37,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:09:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-11 02:09:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741885998] [2024-10-11 02:09:37,957 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:37,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:09:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:09:37,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-10-11 02:09:37,958 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-11 02:09:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:38,469 INFO L93 Difference]: Finished difference Result 129 states and 174 transitions. [2024-10-11 02:09:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 02:09:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2024-10-11 02:09:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:38,473 INFO L225 Difference]: With dead ends: 129 [2024-10-11 02:09:38,473 INFO L226 Difference]: Without dead ends: 127 [2024-10-11 02:09:38,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-10-11 02:09:38,474 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:38,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 253 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:09:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-11 02:09:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-10-11 02:09:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-10-11 02:09:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2024-10-11 02:09:38,501 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 80 [2024-10-11 02:09:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:38,502 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2024-10-11 02:09:38,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-11 02:09:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2024-10-11 02:09:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-11 02:09:38,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:38,503 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:38,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 02:09:38,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:38,705 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:38,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2024-10-11 02:09:38,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:38,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29132971] [2024-10-11 02:09:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:38,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579979599] [2024-10-11 02:09:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:38,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:38,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:38,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:09:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:38,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 02:09:38,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-10-11 02:09:39,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:09:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-10-11 02:09:39,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:39,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29132971] [2024-10-11 02:09:39,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:09:39,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579979599] [2024-10-11 02:09:39,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579979599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:09:39,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:09:39,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-11 02:09:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260515700] [2024-10-11 02:09:39,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:09:39,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:09:39,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:09:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:09:39,944 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-11 02:09:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:42,317 INFO L93 Difference]: Finished difference Result 225 states and 333 transitions. [2024-10-11 02:09:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 02:09:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2024-10-11 02:09:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:42,320 INFO L225 Difference]: With dead ends: 225 [2024-10-11 02:09:42,320 INFO L226 Difference]: Without dead ends: 221 [2024-10-11 02:09:42,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 02:09:42,322 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 78 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:42,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 498 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-11 02:09:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-10-11 02:09:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2024-10-11 02:09:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 114 states have internal predecessors, (138), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-10-11 02:09:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 324 transitions. [2024-10-11 02:09:42,384 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 324 transitions. Word has length 86 [2024-10-11 02:09:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:42,385 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 324 transitions. [2024-10-11 02:09:42,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-11 02:09:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 324 transitions. [2024-10-11 02:09:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-11 02:09:42,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:42,386 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:42,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 02:09:42,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:09:42,591 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:42,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1470837899, now seen corresponding path program 4 times [2024-10-11 02:09:42,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:42,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291480752] [2024-10-11 02:09:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:42,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 02:09:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 02:09:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 02:09:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 02:09:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 02:09:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-11 02:09:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-11 02:09:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-11 02:09:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-11 02:09:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-11 02:09:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-11 02:09:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-11 02:09:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,723 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-11 02:09:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-11 02:09:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-10-11 02:09:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-10-11 02:09:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:09:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291480752] [2024-10-11 02:09:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291480752] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:09:42,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:09:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:09:42,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561348393] [2024-10-11 02:09:42,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:09:42,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:09:42,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:09:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:09:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:09:42,746 INFO L87 Difference]: Start difference. First operand 218 states and 324 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-11 02:09:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:09:42,865 INFO L93 Difference]: Finished difference Result 271 states and 400 transitions. [2024-10-11 02:09:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:09:42,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2024-10-11 02:09:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:09:42,868 INFO L225 Difference]: With dead ends: 271 [2024-10-11 02:09:42,868 INFO L226 Difference]: Without dead ends: 197 [2024-10-11 02:09:42,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:09:42,872 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:09:42,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:09:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-11 02:09:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2024-10-11 02:09:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 97 states have internal predecessors, (111), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-10-11 02:09:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2024-10-11 02:09:42,933 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 95 [2024-10-11 02:09:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:09:42,933 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2024-10-11 02:09:42,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-10-11 02:09:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2024-10-11 02:09:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-10-11 02:09:42,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:09:42,936 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:09:42,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 02:09:42,936 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:09:42,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:09:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1556724626, now seen corresponding path program 1 times [2024-10-11 02:09:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:09:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015899752] [2024-10-11 02:09:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:09:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:09:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132097599] [2024-10-11 02:09:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:09:42,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:09:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:09:42,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:09:42,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 02:09:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:09:43,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-11 02:09:43,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:09:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 74 proven. 35 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-10-11 02:09:43,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:10:02,373 WARN L286 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 02:10:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 26 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-10-11 02:10:35,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:10:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015899752] [2024-10-11 02:10:35,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:10:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132097599] [2024-10-11 02:10:35,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132097599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:10:35,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:10:35,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2024-10-11 02:10:35,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164707308] [2024-10-11 02:10:35,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:10:35,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 02:10:35,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:10:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 02:10:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=487, Unknown=1, NotChecked=0, Total=600 [2024-10-11 02:10:35,744 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-11 02:10:37,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:10:42,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []