./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_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:10:30,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:10:30,377 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:10:30,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:10:30,383 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:10:30,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:10:30,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:10:30,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:10:30,411 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:10:30,411 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:10:30,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:10:30,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:10:30,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:10:30,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:10:30,416 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:10:30,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:10:30,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:10:30,417 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:10:30,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:10:30,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:10:30,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:10:30,422 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:10:30,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:10:30,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:10:30,423 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:10:30,423 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:10:30,423 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:10:30,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:10:30,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:10:30,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:10:30,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:10:30,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:10:30,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:10:30,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:10:30,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:10:30,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:10:30,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:10:30,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:10:30,426 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:10:30,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:10:30,426 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:10:30,427 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:10:30,427 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 [2024-10-24 00:10:30,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:10:30,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:10:30,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:10:30,708 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:10:30,709 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:10:30,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2024-10-24 00:10:32,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:10:32,428 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:10:32,429 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2024-10-24 00:10:32,440 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887bb05be/fdb3f390474d44e98b73a21ad3bf9e85/FLAGff408fe84 [2024-10-24 00:10:32,454 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887bb05be/fdb3f390474d44e98b73a21ad3bf9e85 [2024-10-24 00:10:32,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:10:32,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:10:32,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:10:32,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:10:32,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:10:32,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245367b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32, skipping insertion in model container [2024-10-24 00:10:32,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,494 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:10:32,678 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_unwindbound20.c[490,503] [2024-10-24 00:10:32,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:10:32,707 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:10:32,720 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_unwindbound20.c[490,503] [2024-10-24 00:10:32,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:10:32,747 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:10:32,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32 WrapperNode [2024-10-24 00:10:32,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:10:32,749 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:10:32,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:10:32,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:10:32,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,779 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2024-10-24 00:10:32,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:10:32,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:10:32,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:10:32,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:10:32,789 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,791 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,808 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]. [2024-10-24 00:10:32,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:10:32,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:10:32,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:10:32,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:10:32,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (1/1) ... [2024-10-24 00:10:32,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:10:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:32,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 00:10:32,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 00:10:32,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:10:32,927 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:10:32,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:10:32,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:10:32,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:10:32,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:10:32,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:10:32,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:10:33,004 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:10:33,006 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:10:33,221 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-24 00:10:33,221 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:10:33,258 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:10:33,259 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:10:33,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:10:33 BoogieIcfgContainer [2024-10-24 00:10:33,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:10:33,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:10:33,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:10:33,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:10:33,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:10:32" (1/3) ... [2024-10-24 00:10:33,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e3f41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:10:33, skipping insertion in model container [2024-10-24 00:10:33,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:10:32" (2/3) ... [2024-10-24 00:10:33,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e3f41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:10:33, skipping insertion in model container [2024-10-24 00:10:33,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:10:33" (3/3) ... [2024-10-24 00:10:33,270 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2024-10-24 00:10:33,287 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:10:33,288 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:10:33,356 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:10:33,363 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;@42aa9b7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:10:33,365 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:10:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:10:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 00:10:33,376 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:33,376 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:33,377 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:33,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash -689848145, now seen corresponding path program 1 times [2024-10-24 00:10:33,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:33,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18635021] [2024-10-24 00:10:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:33,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:33,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:33,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:33,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18635021] [2024-10-24 00:10:33,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18635021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:33,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:33,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:10:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351028648] [2024-10-24 00:10:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:33,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:10:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:10:33,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:10:33,636 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:10:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:33,677 INFO L93 Difference]: Finished difference Result 60 states and 99 transitions. [2024-10-24 00:10:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:10:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-10-24 00:10:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:33,689 INFO L225 Difference]: With dead ends: 60 [2024-10-24 00:10:33,690 INFO L226 Difference]: Without dead ends: 29 [2024-10-24 00:10:33,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:10:33,700 INFO L432 NwaCegarLoop]: 40 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, 40 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 [2024-10-24 00:10:33,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-24 00:10:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-24 00:10:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 00:10:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-10-24 00:10:33,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2024-10-24 00:10:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:33,743 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-10-24 00:10:33,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:10:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-10-24 00:10:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 00:10:33,746 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:33,769 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:33,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:10:33,770 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:33,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1989097615, now seen corresponding path program 1 times [2024-10-24 00:10:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:33,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12364741] [2024-10-24 00:10:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:33,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:33,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:34,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:34,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12364741] [2024-10-24 00:10:34,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12364741] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:34,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:34,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 00:10:34,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095089885] [2024-10-24 00:10:34,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:34,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 00:10:34,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 00:10:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:10:34,068 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 00:10:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:34,108 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-10-24 00:10:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 00:10:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2024-10-24 00:10:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:34,110 INFO L225 Difference]: With dead ends: 39 [2024-10-24 00:10:34,110 INFO L226 Difference]: Without dead ends: 31 [2024-10-24 00:10:34,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:10:34,112 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:34,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-24 00:10:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-24 00:10:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 00:10:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-10-24 00:10:34,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2024-10-24 00:10:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:34,123 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-10-24 00:10:34,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 00:10:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-10-24 00:10:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 00:10:34,125 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:34,125 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:34,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:10:34,126 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:34,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:34,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1539070609, now seen corresponding path program 1 times [2024-10-24 00:10:34,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:34,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195305182] [2024-10-24 00:10:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:34,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 00:10:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:34,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195305182] [2024-10-24 00:10:34,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195305182] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409481777] [2024-10-24 00:10:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:34,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:34,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:34,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:10:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:34,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:10:34,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:34,633 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:34,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409481777] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:34,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:34,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-24 00:10:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402585489] [2024-10-24 00:10:34,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:34,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:10:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:10:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:10:34,636 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:10:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:34,754 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-10-24 00:10:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:10:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-24 00:10:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:34,756 INFO L225 Difference]: With dead ends: 48 [2024-10-24 00:10:34,756 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 00:10:34,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:10:34,757 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:34,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 00:10:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-10-24 00:10:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-24 00:10:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-10-24 00:10:34,768 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 29 [2024-10-24 00:10:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:34,768 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-10-24 00:10:34,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:10:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-10-24 00:10:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 00:10:34,769 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:34,769 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:34,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:10:34,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:34,971 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:34,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1634889762, now seen corresponding path program 1 times [2024-10-24 00:10:34,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:34,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231586251] [2024-10-24 00:10:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95132873] [2024-10-24 00:10:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:34,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:34,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:34,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:10:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:10:35,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:35,121 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:35,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:35,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231586251] [2024-10-24 00:10:35,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95132873] [2024-10-24 00:10:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95132873] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:35,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:35,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:10:35,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204366161] [2024-10-24 00:10:35,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:35,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:10:35,129 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 00:10:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:35,201 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2024-10-24 00:10:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-10-24 00:10:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:35,204 INFO L225 Difference]: With dead ends: 65 [2024-10-24 00:10:35,205 INFO L226 Difference]: Without dead ends: 63 [2024-10-24 00:10:35,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:35,210 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:35,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-24 00:10:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-10-24 00:10:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 00:10:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2024-10-24 00:10:35,228 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 31 [2024-10-24 00:10:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:35,229 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2024-10-24 00:10:35,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 00:10:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2024-10-24 00:10:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:10:35,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:35,232 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:35,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 00:10:35,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-24 00:10:35,433 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:35,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -254153455, now seen corresponding path program 1 times [2024-10-24 00:10:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:35,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691320046] [2024-10-24 00:10:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:35,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-24 00:10:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 00:10:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691320046] [2024-10-24 00:10:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691320046] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998104338] [2024-10-24 00:10:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:35,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:35,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:35,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:10:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:35,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:10:35,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:35,780 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998104338] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:35,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:35,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-10-24 00:10:35,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103824688] [2024-10-24 00:10:35,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:35,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:10:35,782 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 00:10:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:35,860 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-10-24 00:10:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-10-24 00:10:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:35,864 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:10:35,865 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 00:10:35,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:10:35,866 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:35,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 00:10:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-10-24 00:10:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-24 00:10:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-10-24 00:10:35,890 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 34 [2024-10-24 00:10:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:35,891 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-10-24 00:10:35,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 00:10:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-10-24 00:10:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:10:35,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:35,894 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:35,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 00:10:36,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:36,095 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:36,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash 753217482, now seen corresponding path program 1 times [2024-10-24 00:10:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919068756] [2024-10-24 00:10:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:36,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:10:36,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919068756] [2024-10-24 00:10:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919068756] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:36,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:36,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 00:10:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536044110] [2024-10-24 00:10:36,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:36,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:10:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:10:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:36,219 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 00:10:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:36,271 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2024-10-24 00:10:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:10:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-10-24 00:10:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:36,273 INFO L225 Difference]: With dead ends: 83 [2024-10-24 00:10:36,274 INFO L226 Difference]: Without dead ends: 57 [2024-10-24 00:10:36,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:36,275 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:36,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-24 00:10:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-24 00:10:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-24 00:10:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2024-10-24 00:10:36,286 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 34 [2024-10-24 00:10:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:36,287 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2024-10-24 00:10:36,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 00:10:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2024-10-24 00:10:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-24 00:10:36,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:36,291 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-10-24 00:10:36,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 00:10:36,292 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:36,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash 439925314, now seen corresponding path program 1 times [2024-10-24 00:10:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:36,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277058943] [2024-10-24 00:10:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:36,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318913333] [2024-10-24 00:10:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:36,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:36,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:36,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:36,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:10:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:10:36,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-24 00:10:36,569 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:10:36,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277058943] [2024-10-24 00:10:36,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318913333] [2024-10-24 00:10:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318913333] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:10:36,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:10:36,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:10:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060792764] [2024-10-24 00:10:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:36,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:10:36,575 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-24 00:10:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:36,634 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2024-10-24 00:10:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 46 [2024-10-24 00:10:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:36,636 INFO L225 Difference]: With dead ends: 64 [2024-10-24 00:10:36,636 INFO L226 Difference]: Without dead ends: 62 [2024-10-24 00:10:36,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:10:36,637 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:36,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 123 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-24 00:10:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-10-24 00:10:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-24 00:10:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-10-24 00:10:36,647 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 46 [2024-10-24 00:10:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:36,648 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-10-24 00:10:36,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-24 00:10:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-10-24 00:10:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-24 00:10:36,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:36,649 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-10-24 00:10:36,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:10:36,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:36,850 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:36,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash -982723610, now seen corresponding path program 1 times [2024-10-24 00:10:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:36,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603732418] [2024-10-24 00:10:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:36,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833701400] [2024-10-24 00:10:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:36,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:36,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:36,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:10:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:36,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:10:36,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:37,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-24 00:10:37,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:37,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603732418] [2024-10-24 00:10:37,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:37,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833701400] [2024-10-24 00:10:37,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833701400] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:37,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:10:37,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-24 00:10:37,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065654376] [2024-10-24 00:10:37,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:10:37,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:10:37,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:37,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:10:37,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:10:37,154 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-24 00:10:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:37,210 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-10-24 00:10:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:10:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2024-10-24 00:10:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:37,212 INFO L225 Difference]: With dead ends: 67 [2024-10-24 00:10:37,213 INFO L226 Difference]: Without dead ends: 65 [2024-10-24 00:10:37,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:10:37,214 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:37,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:10:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-24 00:10:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2024-10-24 00:10:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-24 00:10:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-10-24 00:10:37,229 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 54 [2024-10-24 00:10:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:37,229 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-10-24 00:10:37,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-24 00:10:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-10-24 00:10:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-24 00:10:37,230 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:37,230 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2024-10-24 00:10:37,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:10:37,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:37,432 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:37,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1428774585, now seen corresponding path program 1 times [2024-10-24 00:10:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700668651] [2024-10-24 00:10:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:37,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:37,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700668651] [2024-10-24 00:10:37,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700668651] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:37,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662322966] [2024-10-24 00:10:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:37,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:37,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:37,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:10:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:37,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:10:37,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:37,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662322966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:37,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:10:37,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-24 00:10:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700764364] [2024-10-24 00:10:37,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:37,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:10:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:10:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:10:37,810 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:37,992 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2024-10-24 00:10:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:10:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 55 [2024-10-24 00:10:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:37,994 INFO L225 Difference]: With dead ends: 210 [2024-10-24 00:10:37,994 INFO L226 Difference]: Without dead ends: 202 [2024-10-24 00:10:37,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:10:37,996 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 80 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:37,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 192 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-10-24 00:10:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2024-10-24 00:10:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 128 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-10-24 00:10:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2024-10-24 00:10:38,054 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 55 [2024-10-24 00:10:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:38,055 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2024-10-24 00:10:38,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2024-10-24 00:10:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 00:10:38,056 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:38,056 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2024-10-24 00:10:38,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 00:10:38,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:38,257 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:38,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1348925863, now seen corresponding path program 1 times [2024-10-24 00:10:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095424484] [2024-10-24 00:10:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:38,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 00:10:38,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095424484] [2024-10-24 00:10:38,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095424484] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769227175] [2024-10-24 00:10:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:38,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:38,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:38,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:38,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:10:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:38,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:10:38,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 00:10:38,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 00:10:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769227175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:38,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:10:38,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-24 00:10:38,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806028742] [2024-10-24 00:10:38,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:38,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 00:10:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 00:10:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:10:38,634 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-24 00:10:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:38,825 INFO L93 Difference]: Finished difference Result 278 states and 363 transitions. [2024-10-24 00:10:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:10:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2024-10-24 00:10:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:38,828 INFO L225 Difference]: With dead ends: 278 [2024-10-24 00:10:38,828 INFO L226 Difference]: Without dead ends: 258 [2024-10-24 00:10:38,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:10:38,830 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:38,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 241 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-24 00:10:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2024-10-24 00:10:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-10-24 00:10:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 298 transitions. [2024-10-24 00:10:38,867 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 298 transitions. Word has length 56 [2024-10-24 00:10:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:38,868 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 298 transitions. [2024-10-24 00:10:38,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-24 00:10:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 298 transitions. [2024-10-24 00:10:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-24 00:10:38,869 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:38,869 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:38,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 00:10:39,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:39,070 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:39,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:39,071 INFO L85 PathProgramCache]: Analyzing trace with hash -848672706, now seen corresponding path program 1 times [2024-10-24 00:10:39,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:39,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598256789] [2024-10-24 00:10:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:39,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:10:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,189 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:10:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:10:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:10:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:10:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:10:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:10:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:10:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598256789] [2024-10-24 00:10:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598256789] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:10:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667792317] [2024-10-24 00:10:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:39,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:39,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:39,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:39,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 00:10:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:10:39,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:39,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-24 00:10:39,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667792317] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:39,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:10:39,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-24 00:10:39,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633070213] [2024-10-24 00:10:39,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:39,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:10:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:10:39,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:10:39,434 INFO L87 Difference]: Start difference. First operand 234 states and 298 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:39,642 INFO L93 Difference]: Finished difference Result 343 states and 447 transitions. [2024-10-24 00:10:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 00:10:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 58 [2024-10-24 00:10:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:39,645 INFO L225 Difference]: With dead ends: 343 [2024-10-24 00:10:39,645 INFO L226 Difference]: Without dead ends: 247 [2024-10-24 00:10:39,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:10:39,651 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 90 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:39,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 184 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-10-24 00:10:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2024-10-24 00:10:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 160 states have (on average 1.175) internal successors, (188), 163 states have internal predecessors, (188), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-10-24 00:10:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2024-10-24 00:10:39,683 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 58 [2024-10-24 00:10:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:39,683 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2024-10-24 00:10:39,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-10-24 00:10:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2024-10-24 00:10:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-24 00:10:39,684 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:39,685 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2024-10-24 00:10:39,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 00:10:39,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 00:10:39,886 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:39,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash -421956392, now seen corresponding path program 1 times [2024-10-24 00:10:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880655298] [2024-10-24 00:10:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:39,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:39,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546682035] [2024-10-24 00:10:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:39,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:39,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:39,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:39,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 00:10:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:10:39,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 00:10:39,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-24 00:10:40,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-24 00:10:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:40,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880655298] [2024-10-24 00:10:40,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546682035] [2024-10-24 00:10:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546682035] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:40,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:10:40,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-10-24 00:10:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065410646] [2024-10-24 00:10:40,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:40,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:10:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:10:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:10:40,479 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:10:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:40,692 INFO L93 Difference]: Finished difference Result 282 states and 354 transitions. [2024-10-24 00:10:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:10:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 63 [2024-10-24 00:10:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:40,695 INFO L225 Difference]: With dead ends: 282 [2024-10-24 00:10:40,695 INFO L226 Difference]: Without dead ends: 277 [2024-10-24 00:10:40,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:10:40,699 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 31 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:40,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 307 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:10:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-10-24 00:10:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2024-10-24 00:10:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 182 states have (on average 1.1868131868131868) internal successors, (216), 186 states have internal predecessors, (216), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-10-24 00:10:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2024-10-24 00:10:40,742 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 63 [2024-10-24 00:10:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:40,743 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2024-10-24 00:10:40,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:10:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2024-10-24 00:10:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-24 00:10:40,744 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:40,744 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2024-10-24 00:10:40,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 00:10:40,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:40,947 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:40,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash -245166072, now seen corresponding path program 2 times [2024-10-24 00:10:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:40,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407144519] [2024-10-24 00:10:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:40,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658310838] [2024-10-24 00:10:40,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:10:40,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:40,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:40,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 00:10:41,042 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:10:41,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:10:41,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 00:10:41,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-24 00:10:41,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-24 00:10:41,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:10:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407144519] [2024-10-24 00:10:41,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:10:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658310838] [2024-10-24 00:10:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658310838] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:10:41,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:10:41,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-10-24 00:10:41,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848086022] [2024-10-24 00:10:41,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:10:41,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:10:41,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:10:41,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:10:41,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:10:41,865 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-24 00:10:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:10:43,444 INFO L93 Difference]: Finished difference Result 439 states and 594 transitions. [2024-10-24 00:10:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:10:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 68 [2024-10-24 00:10:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:10:43,449 INFO L225 Difference]: With dead ends: 439 [2024-10-24 00:10:43,450 INFO L226 Difference]: Without dead ends: 437 [2024-10-24 00:10:43,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:10:43,452 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-24 00:10:43,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 388 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-24 00:10:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-10-24 00:10:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 392. [2024-10-24 00:10:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 257 states have (on average 1.245136186770428) internal successors, (320), 261 states have internal predecessors, (320), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-10-24 00:10:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 518 transitions. [2024-10-24 00:10:43,519 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 518 transitions. Word has length 68 [2024-10-24 00:10:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:10:43,519 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 518 transitions. [2024-10-24 00:10:43,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-24 00:10:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 518 transitions. [2024-10-24 00:10:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 00:10:43,520 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:10:43,521 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:10:43,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 00:10:43,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 00:10:43,721 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:10:43,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:10:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash -441972072, now seen corresponding path program 3 times [2024-10-24 00:10:43,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:10:43,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578385426] [2024-10-24 00:10:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:10:43,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:10:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:10:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12918648] [2024-10-24 00:10:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:10:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:10:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:10:43,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:10:43,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 00:10:43,809 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:10:43,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:10:43,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-24 00:10:43,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:10:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-24 00:10:44,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:10:59,225 WARN L286 SmtUtils]: Spent 12.31s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 00:11:32,389 WARN L286 SmtUtils]: Spent 25.79s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-24 00:11:34,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578385426] [2024-10-24 00:11:34,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12918648] [2024-10-24 00:11:34,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12918648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:34,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:34,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 00:11:34,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050704049] [2024-10-24 00:11:34,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:34,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:11:34,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:11:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-10-24 00:11:34,958 INFO L87 Difference]: Start difference. First operand 392 states and 518 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-24 00:11:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:35,934 INFO L93 Difference]: Finished difference Result 415 states and 538 transitions. [2024-10-24 00:11:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:11:35,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2024-10-24 00:11:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:35,937 INFO L225 Difference]: With dead ends: 415 [2024-10-24 00:11:35,937 INFO L226 Difference]: Without dead ends: 411 [2024-10-24 00:11:35,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:11:35,939 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:35,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 263 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 00:11:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-10-24 00:11:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2024-10-24 00:11:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 271 states have (on average 1.2287822878228782) internal successors, (333), 274 states have internal predecessors, (333), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-10-24 00:11:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 531 transitions. [2024-10-24 00:11:36,018 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 531 transitions. Word has length 73 [2024-10-24 00:11:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:36,019 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 531 transitions. [2024-10-24 00:11:36,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-24 00:11:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 531 transitions. [2024-10-24 00:11:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-24 00:11:36,020 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:36,020 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:36,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 00:11:36,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 00:11:36,223 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:36,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2054740817, now seen corresponding path program 1 times [2024-10-24 00:11:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806831900] [2024-10-24 00:11:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:36,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:36,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252343271] [2024-10-24 00:11:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:36,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:36,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:36,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 00:11:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:36,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-24 00:11:36,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-24 00:11:36,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-24 00:11:37,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:37,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806831900] [2024-10-24 00:11:37,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:37,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252343271] [2024-10-24 00:11:37,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252343271] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:37,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:37,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-24 00:11:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831303642] [2024-10-24 00:11:37,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:37,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 00:11:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 00:11:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-24 00:11:37,558 INFO L87 Difference]: Start difference. First operand 410 states and 531 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-24 00:11:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:40,886 INFO L93 Difference]: Finished difference Result 607 states and 850 transitions. [2024-10-24 00:11:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 00:11:40,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2024-10-24 00:11:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:40,892 INFO L225 Difference]: With dead ends: 607 [2024-10-24 00:11:40,892 INFO L226 Difference]: Without dead ends: 596 [2024-10-24 00:11:40,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 00:11:40,895 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 129 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:40,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 668 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-24 00:11:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-10-24 00:11:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 552. [2024-10-24 00:11:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 356 states have (on average 1.297752808988764) internal successors, (462), 359 states have internal predecessors, (462), 156 states have call successors, (156), 39 states have call predecessors, (156), 39 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2024-10-24 00:11:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 772 transitions. [2024-10-24 00:11:41,027 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 772 transitions. Word has length 79 [2024-10-24 00:11:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:41,027 INFO L471 AbstractCegarLoop]: Abstraction has 552 states and 772 transitions. [2024-10-24 00:11:41,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-24 00:11:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 772 transitions. [2024-10-24 00:11:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-24 00:11:41,028 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:41,028 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 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] [2024-10-24 00:11:41,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 00:11:41,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 00:11:41,233 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:41,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash 653663042, now seen corresponding path program 4 times [2024-10-24 00:11:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:41,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309123078] [2024-10-24 00:11:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:41,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:11:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:11:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:11:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:11:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:11:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:11:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:11:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:11:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:11:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-24 00:11:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-24 00:11:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309123078] [2024-10-24 00:11:41,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309123078] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:11:41,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:11:41,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:11:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173518412] [2024-10-24 00:11:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:11:41,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:11:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:11:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:11:41,392 INFO L87 Difference]: Start difference. First operand 552 states and 772 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-24 00:11:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:41,607 INFO L93 Difference]: Finished difference Result 889 states and 1328 transitions. [2024-10-24 00:11:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:11:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 90 [2024-10-24 00:11:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:41,612 INFO L225 Difference]: With dead ends: 889 [2024-10-24 00:11:41,613 INFO L226 Difference]: Without dead ends: 625 [2024-10-24 00:11:41,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:41,615 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:41,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-10-24 00:11:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 530. [2024-10-24 00:11:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 338 states have (on average 1.2781065088757397) internal successors, (432), 341 states have internal predecessors, (432), 152 states have call successors, (152), 39 states have call predecessors, (152), 39 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2024-10-24 00:11:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 734 transitions. [2024-10-24 00:11:41,754 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 734 transitions. Word has length 90 [2024-10-24 00:11:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:41,754 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 734 transitions. [2024-10-24 00:11:41,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-24 00:11:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 734 transitions. [2024-10-24 00:11:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-24 00:11:41,756 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:41,756 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:41,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-24 00:11:41,756 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:41,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1858222944, now seen corresponding path program 1 times [2024-10-24 00:11:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449527152] [2024-10-24 00:11:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296087797] [2024-10-24 00:11:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:41,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:41,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:41,779 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:41,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 00:11:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:41,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-24 00:11:41,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-10-24 00:11:42,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449527152] [2024-10-24 00:11:43,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296087797] [2024-10-24 00:11:43,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296087797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:43,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:43,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 00:11:43,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881004248] [2024-10-24 00:11:43,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:43,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:11:43,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:11:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-24 00:11:43,161 INFO L87 Difference]: Start difference. First operand 530 states and 734 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-24 00:11:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:44,137 INFO L93 Difference]: Finished difference Result 539 states and 742 transitions. [2024-10-24 00:11:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:11:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 96 [2024-10-24 00:11:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:44,142 INFO L225 Difference]: With dead ends: 539 [2024-10-24 00:11:44,142 INFO L226 Difference]: Without dead ends: 537 [2024-10-24 00:11:44,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:11:44,143 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:44,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 465 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 00:11:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2024-10-24 00:11:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2024-10-24 00:11:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 341 states have (on average 1.2727272727272727) internal successors, (434), 344 states have internal predecessors, (434), 152 states have call successors, (152), 40 states have call predecessors, (152), 40 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2024-10-24 00:11:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 736 transitions. [2024-10-24 00:11:44,291 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 736 transitions. Word has length 96 [2024-10-24 00:11:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:44,292 INFO L471 AbstractCegarLoop]: Abstraction has 534 states and 736 transitions. [2024-10-24 00:11:44,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-10-24 00:11:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 736 transitions. [2024-10-24 00:11:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-24 00:11:44,296 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:44,296 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 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] [2024-10-24 00:11:44,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:44,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 00:11:44,497 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:44,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 973829189, now seen corresponding path program 1 times [2024-10-24 00:11:44,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:44,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612684928] [2024-10-24 00:11:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:44,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:11:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:11:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:11:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:11:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:11:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:11:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:11:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:11:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:11:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-24 00:11:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-24 00:11:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-24 00:11:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-24 00:11:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-10-24 00:11:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-10-24 00:11:44,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612684928] [2024-10-24 00:11:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612684928] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504423601] [2024-10-24 00:11:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:44,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:44,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 00:11:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:44,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:11:44,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-10-24 00:11:44,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-10-24 00:11:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504423601] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:44,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:44,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-10-24 00:11:44,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021365676] [2024-10-24 00:11:44,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:44,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 00:11:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 00:11:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:11:44,865 INFO L87 Difference]: Start difference. First operand 534 states and 736 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-24 00:11:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:45,228 INFO L93 Difference]: Finished difference Result 730 states and 1052 transitions. [2024-10-24 00:11:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 00:11:45,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 111 [2024-10-24 00:11:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:45,233 INFO L225 Difference]: With dead ends: 730 [2024-10-24 00:11:45,233 INFO L226 Difference]: Without dead ends: 717 [2024-10-24 00:11:45,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:11:45,235 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 31 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:45,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 388 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:11:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2024-10-24 00:11:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 578. [2024-10-24 00:11:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 377 states have (on average 1.2785145888594165) internal successors, (482), 380 states have internal predecessors, (482), 160 states have call successors, (160), 40 states have call predecessors, (160), 40 states have return successors, (158), 157 states have call predecessors, (158), 158 states have call successors, (158) [2024-10-24 00:11:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 800 transitions. [2024-10-24 00:11:45,386 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 800 transitions. Word has length 111 [2024-10-24 00:11:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:45,386 INFO L471 AbstractCegarLoop]: Abstraction has 578 states and 800 transitions. [2024-10-24 00:11:45,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-24 00:11:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 800 transitions. [2024-10-24 00:11:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-24 00:11:45,388 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:45,388 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:45,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-24 00:11:45,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:45,589 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:45,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:45,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1981200126, now seen corresponding path program 1 times [2024-10-24 00:11:45,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:45,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010713453] [2024-10-24 00:11:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:45,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:11:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:11:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:11:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 00:11:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:11:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:11:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-24 00:11:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 00:11:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 00:11:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:11:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:11:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-24 00:11:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-24 00:11:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-24 00:11:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-24 00:11:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-24 00:11:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-24 00:11:45,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010713453] [2024-10-24 00:11:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010713453] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655443556] [2024-10-24 00:11:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:45,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:45,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:45,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 00:11:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:11:45,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:11:45,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-10-24 00:11:46,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-24 00:11:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655443556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:46,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:11:46,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-10-24 00:11:46,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074137425] [2024-10-24 00:11:46,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:46,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 00:11:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 00:11:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=224, Unknown=0, NotChecked=0, Total=380 [2024-10-24 00:11:46,255 INFO L87 Difference]: Start difference. First operand 578 states and 800 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2024-10-24 00:11:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:47,146 INFO L93 Difference]: Finished difference Result 1897 states and 2637 transitions. [2024-10-24 00:11:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-24 00:11:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) Word has length 111 [2024-10-24 00:11:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:47,161 INFO L225 Difference]: With dead ends: 1897 [2024-10-24 00:11:47,161 INFO L226 Difference]: Without dead ends: 1588 [2024-10-24 00:11:47,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2024-10-24 00:11:47,165 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:47,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 301 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:11:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2024-10-24 00:11:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1514. [2024-10-24 00:11:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 948 states have (on average 1.2056962025316456) internal successors, (1143), 965 states have internal predecessors, (1143), 429 states have call successors, (429), 136 states have call predecessors, (429), 136 states have return successors, (413), 412 states have call predecessors, (413), 413 states have call successors, (413) [2024-10-24 00:11:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1985 transitions. [2024-10-24 00:11:47,596 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1985 transitions. Word has length 111 [2024-10-24 00:11:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:47,598 INFO L471 AbstractCegarLoop]: Abstraction has 1514 states and 1985 transitions. [2024-10-24 00:11:47,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 10 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2024-10-24 00:11:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1985 transitions. [2024-10-24 00:11:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-24 00:11:47,600 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:47,600 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:47,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 00:11:47,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:47,805 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:47,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash -904635594, now seen corresponding path program 2 times [2024-10-24 00:11:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:47,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287246532] [2024-10-24 00:11:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:47,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:47,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224752993] [2024-10-24 00:11:47,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:11:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:47,838 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:47,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 00:11:47,925 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:11:47,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:47,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-24 00:11:47,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 58 proven. 56 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2024-10-24 00:11:48,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2024-10-24 00:11:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287246532] [2024-10-24 00:11:48,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224752993] [2024-10-24 00:11:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224752993] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:11:48,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:11:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2024-10-24 00:11:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492810017] [2024-10-24 00:11:48,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:48,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 00:11:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 00:11:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:11:48,885 INFO L87 Difference]: Start difference. First operand 1514 states and 1985 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 20 states have internal predecessors, (60), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-24 00:11:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:52,086 INFO L93 Difference]: Finished difference Result 1673 states and 2185 transitions. [2024-10-24 00:11:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:11:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 20 states have internal predecessors, (60), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) Word has length 113 [2024-10-24 00:11:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:52,097 INFO L225 Difference]: With dead ends: 1673 [2024-10-24 00:11:52,097 INFO L226 Difference]: Without dead ends: 1658 [2024-10-24 00:11:52,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 00:11:52,101 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 80 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:52,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 551 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-24 00:11:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2024-10-24 00:11:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1584. [2024-10-24 00:11:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1010 states have (on average 1.2) internal successors, (1212), 1024 states have internal predecessors, (1212), 422 states have call successors, (422), 151 states have call predecessors, (422), 151 states have return successors, (413), 408 states have call predecessors, (413), 413 states have call successors, (413) [2024-10-24 00:11:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2047 transitions. [2024-10-24 00:11:52,551 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2047 transitions. Word has length 113 [2024-10-24 00:11:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:52,553 INFO L471 AbstractCegarLoop]: Abstraction has 1584 states and 2047 transitions. [2024-10-24 00:11:52,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 20 states have internal predecessors, (60), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-24 00:11:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2047 transitions. [2024-10-24 00:11:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-10-24 00:11:52,557 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:52,557 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:52,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 00:11:52,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:52,762 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:52,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash 493843562, now seen corresponding path program 3 times [2024-10-24 00:11:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074788808] [2024-10-24 00:11:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:52,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699536775] [2024-10-24 00:11:52,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:11:52,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:52,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:52,796 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:52,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 00:11:52,874 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:11:52,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:52,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-24 00:11:52,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 75 proven. 47 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-10-24 00:11:53,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074788808] [2024-10-24 00:11:54,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699536775] [2024-10-24 00:11:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699536775] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:54,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-24 00:11:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660668857] [2024-10-24 00:11:54,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:54,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 00:11:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 00:11:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:11:54,485 INFO L87 Difference]: Start difference. First operand 1584 states and 2047 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:11:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:55,343 INFO L93 Difference]: Finished difference Result 1714 states and 2184 transitions. [2024-10-24 00:11:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:11:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 118 [2024-10-24 00:11:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:55,353 INFO L225 Difference]: With dead ends: 1714 [2024-10-24 00:11:55,353 INFO L226 Difference]: Without dead ends: 1712 [2024-10-24 00:11:55,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2024-10-24 00:11:55,355 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:55,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 556 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 00:11:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2024-10-24 00:11:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1697. [2024-10-24 00:11:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1084 states have (on average 1.1918819188191883) internal successors, (1292), 1098 states have internal predecessors, (1292), 442 states have call successors, (442), 170 states have call predecessors, (442), 170 states have return successors, (433), 428 states have call predecessors, (433), 433 states have call successors, (433) [2024-10-24 00:11:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2167 transitions. [2024-10-24 00:11:55,781 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2167 transitions. Word has length 118 [2024-10-24 00:11:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:55,782 INFO L471 AbstractCegarLoop]: Abstraction has 1697 states and 2167 transitions. [2024-10-24 00:11:55,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-24 00:11:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2167 transitions. [2024-10-24 00:11:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-10-24 00:11:55,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:55,783 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:55,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 00:11:55,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:55,984 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:55,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1344061032, now seen corresponding path program 4 times [2024-10-24 00:11:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:55,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444690964] [2024-10-24 00:11:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:55,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786755204] [2024-10-24 00:11:56,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:11:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:56,007 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:56,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 00:11:56,093 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:11:56,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:56,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-24 00:11:56,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:11:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-10-24 00:11:57,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:11:57,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:11:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444690964] [2024-10-24 00:11:57,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:11:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786755204] [2024-10-24 00:11:57,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786755204] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:11:57,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:11:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-24 00:11:57,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321431816] [2024-10-24 00:11:57,680 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:11:57,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 00:11:57,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:11:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 00:11:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-10-24 00:11:57,681 INFO L87 Difference]: Start difference. First operand 1697 states and 2167 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-24 00:11:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:11:59,195 INFO L93 Difference]: Finished difference Result 1810 states and 2303 transitions. [2024-10-24 00:11:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 00:11:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 119 [2024-10-24 00:11:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:11:59,206 INFO L225 Difference]: With dead ends: 1810 [2024-10-24 00:11:59,206 INFO L226 Difference]: Without dead ends: 1808 [2024-10-24 00:11:59,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-10-24 00:11:59,208 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 42 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:11:59,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 688 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-24 00:11:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2024-10-24 00:11:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1694. [2024-10-24 00:11:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1084 states have (on average 1.1900369003690037) internal successors, (1290), 1098 states have internal predecessors, (1290), 438 states have call successors, (438), 171 states have call predecessors, (438), 171 states have return successors, (429), 424 states have call predecessors, (429), 429 states have call successors, (429) [2024-10-24 00:11:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2157 transitions. [2024-10-24 00:11:59,559 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2157 transitions. Word has length 119 [2024-10-24 00:11:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:11:59,560 INFO L471 AbstractCegarLoop]: Abstraction has 1694 states and 2157 transitions. [2024-10-24 00:11:59,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-10-24 00:11:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2157 transitions. [2024-10-24 00:11:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-24 00:11:59,562 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:11:59,562 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:11:59,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 00:11:59,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:59,763 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:11:59,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:11:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1393224842, now seen corresponding path program 5 times [2024-10-24 00:11:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:11:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908088992] [2024-10-24 00:11:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:11:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:11:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:11:59,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385407986] [2024-10-24 00:11:59,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:11:59,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:11:59,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:11:59,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:11:59,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 00:11:59,953 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-24 00:11:59,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:11:59,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-24 00:11:59,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:12:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 74 proven. 56 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-10-24 00:12:01,071 INFO L311 TraceCheckSpWp]: Computing backward predicates...